Malicious PDF — malware analysis report

Static analysis result for SHA-256 48faa7fd3135cac9…

MALICIOUS

PDF

86.5 KB Created: 2021-07-03 06:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b2d0411b349d846d6c5e4fba624e4bc1 SHA-1: f5abe59ea8202351b0cd2afbd58d800721956981 SHA-256: 48faa7fd3135cac922b74bbe2da9808e2023e9e539f27328f15bbda795331e15
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous embedded URLs pointing to compromised CMS upload storage and other potentially untrusted domains, suggesting an attempt to redirect users to malicious content or phishing sites. The document body is heavily obfuscated and unreadable, providing no direct textual clues to its purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://geredekombiservisi.com/userfiles/file/duvitato.pdf In PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/eoi57uvk2kcq1llh1d7u5pcnsg/87281952060.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210509/210509092929124195xugazw29rcf2.pdfIn PDF document text
    • http://mrsinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/1311374614.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/e82bf8a272fee9e1c28d3f45f3deefc8/mefijot.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/f9ll68s24tp8vut5qjod3t45j0/fidelobedomepododezavij.pdfIn PDF document text
    • http://renknh.com/ckupload/files/17171807432.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/f4320ba77861d8e61055ef3ead544e03/mojukelinisolevivotu.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/0b2f9c6ace7jff9qnc35h16d43/79831931338.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/lazujovopozigajidivaximex.pdfIn PDF document text
    • https://ladangmimpi.com/contents//files/24344250898.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084bc2dee081---rezivofujuxadivad.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/001449f4d630b400bb2f581cdec1b5a2/44021783334.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9a940bac8---zomuvimidorewiduvuma.pdfIn PDF document text
    • http://hilimall.ae/uploads/files/pedekamixojopi.pdfIn PDF document text
    • http://finpacecuador.com/userfiles/file/zikagarekojinenavab.pdfIn PDF document text
    • http://ilovegabal.net/fckeditor/_upload/file/jolixowanor.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/76879208902.pdfIn PDF document text
    • http://kraski-chernila.ru/resources/file/vajisujufoxoremola.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/6273e0c0583c17128697bdcc12d20ad2/51341513509.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e2309274b---49608632614.pdfIn PDF document text
    • http://jkphotocon.org/data/userfiles/files/53197529481.pdfIn PDF document text
    • http://kusadasidentalclinic.com/img/userfiles/files/15249334668.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d33d89b403---84439644658.pdfIn PDF document text
    • http://cansuyu.org/resimler/files/56883832499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=in+reference+to+definitionPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8B 10044 bytes
SHA-256: 9f6bf8e2f79f6e01eee54b56a3fc1a0f3d1e7fc06b4123e42ffc8951ed8c5311
font_01_sfnt_off000105f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E03 17852 bytes
SHA-256: 48b1356cc7e2f83d2fd50058f0f3c87042ab777e50814b437e1aefb8597a03c4

Open this report in the interactive analyzer, or submit your own file for analysis.