Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6484fc92a07826d…

MALICIOUS

PDF

84.8 KB Created: 2021-08-07 17:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6a1002854aabe66939f4ab41b4017f0f SHA-1: 2c698c156583a0ad4232a6e08b55d2b8f1bb79c2 SHA-256: f6484fc92a07826d1d29498d28b70ac55d268392bf37b6142e24b44b9fe796e8
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to websites hosted on compromised CMS platforms or disposable domains, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://daismene.it/file/58297149381.pdf In PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fecd324543---wixokobifurejosawo.pdfIn PDF document text
    • https://pavillonwohlen.ch/userfiles/files/66939767936.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/kisitugokubirukafol.pdfIn PDF document text
    • https://dprkoreatour.com/uploads/files/77955614797.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/77171499810.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/snhku6t2j041cpl3ug4k7h7pr1/degudomivuxerinumotetiju.pdfIn PDF document text
    • http://patroha.hu/file/99034997848.pdfIn PDF document text
    • http://yongqingtech.com/d/files/mixodewofogu.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b0400e883---xipizapezapadisu.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/98322289141.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712c98f3612---panawodob.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/n1j0k1ngccqr16u2d2vpbgoel6/19938262576.pdfIn PDF document text
    • http://isemya.by/modules/ariol/static/ariol/ckfinder/files/10895582765.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/17932976778.pdfIn PDF document text
    • https://cherrychile.cl/cherry/uploads/contenido/files/nunezoduveraxuzalos.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/98997315864.pdfIn PDF document text
    • http://ccsl.asia/files/fupejojidizefelalawafak.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089243aed8a0---xuwamalunuzixogogozaresep.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/kobokodisamibam.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1ee791d511b80c55bcf9318cacd4f93f/xotul.pdfIn PDF document text
    • http://agt.es/files/galeria2/files/1721169776.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/fg8mt7ehp43s7ff03n61qaq3k4/silope.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/gobinelexeloniravasarek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+configure+my+dvr+for+remote+viewingPDF 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_off0000ea7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7F 16180 bytes
SHA-256: 1969e1ba2877fcecc927e0aa233abd9d5c36064ae7f6ea27b3ca1cf5cd3472f5
font_01_sfnt_off0001142f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1142F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C46 10800 bytes
SHA-256: 2ad9072250ec62c7b39760a26818640e3dda5f108c81ef30e1252aaf0effc799