Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5f0f0449ea96e28…

MALICIOUS

PDF

97.5 KB Created: 2021-07-29 09:30:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f2973aedb17d2c9eccf36e082230bded SHA-1: d593038b00c696227e0ac0b244e08224f76ab7c2 SHA-256: d5f0f0449ea96e28cd6df9185b50910834e59ce539c1c10f2382b4295b7c57f6
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external PDFs hosted on compromised websites, indicating a link farm designed to redirect users. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the intent is to trick users into believing they are updating payment information or bank details. While no scripts were explicitly extracted, the nature of the links and the ML classifier's output point towards a phishing or financial scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9637

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://bnbcostaverde.it/userfiles/file/43375070207.pdf In PDF document text
    • http://commune-bourre.com/userfiles/file/waxoxa.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/30321758979.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b70ed1da1f4---jufoteditigolis.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/u62l80h93ipiq0bi4ka70seklh/63142757487.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c7db9fe82---58409716170.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/12ffc353565519d523604f1261add0f9/64019106407.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/e9f366f74bdba8254c32770bf95496f8/wibaluxibitapu.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/msbrf1hahjkffgr4kjaplm3sv7/fexitu.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082454a368db---tazelalabu.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b48c471335d---61316352767.pdfIn PDF document text
    • https://fotojursa.cz/userfiles/file/8589442716.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16096863ba10bd---sizebuzedobixibumuwu.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607c248c19438---megazozixolelavogozipewa.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20210612_75514824349B76F2.pdfIn PDF document text
    • https://tigapilar.com/upload/files/zarudu.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2cea2582d---96298995750.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/25fbc29929af2e2dfbdbae6660bebed9/dujalogid.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/kazos.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cf367dd66---jepunujadopexudog.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e544c4b60a3---dirug.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/72094d5b76ad53c563c6c232b8147250/51243005797.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c28e0562b9---69574547539.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/60345257333.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/1129b194eaf517db190c2497d89a6cae/nikutakoguliwaliri.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a01fa3a406---duzopef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=is+asuna+in+alicization+arcPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA66 16276 bytes
SHA-256: 4f53c865a284c71464155f49782310049175ac3f147bd5d28c390b14e87225ec
font_01_sfnt_off00011078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11078 16992 bytes
SHA-256: 67fb6e00edc5f7f94c217c7f3d417180a4a33ef741ea33298f5b184f74f83212
font_02_sfnt_off00013c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C7B 2644 bytes
SHA-256: cdaac6e86ec5acd38bcbdd326e9813dbcfe7f2abc9ab73224184283e567aaef7
font_03_sfnt_off000147f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00016010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16010 10204 bytes
SHA-256: c0359d505ea7e76e68e29c954469b23ef7754ec9bf411fd6a6eb7a5f4993b463

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