Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a2726eb656ceeac…

MALICIOUS

PDF

86.6 KB Created: 2021-06-12 03:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e2aab8925dd3a4d4c05b69889101df92 SHA-1: 6e6ccc9d8b9b33afbefa31201e9be341ce022463 SHA-256: 6a2726eb656ceeace555d8df79a0f9aa294e9c6dffe726c9e3193213a8d0dd1c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or appear to be part of a link farm designed to obscure the ultimate destination. The presence of these links suggests the document is intended to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 https://wastran.ru/uplcv?utm_term=ct6+v+2020 PDF link annotation
    • http://asijskepotraviny.cz/files/file/9928753256.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa090e563ab---dizetukolevatuveralato.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089e5a3a706f---rizobox.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/4bfd47383ac82979bd49438d9364646d/17583435823.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/c8a2fbd126d6999fea15d2eb23b3d415/gunadaxorefitawazitagu.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/82921197430.pdfIn PDF document text
    • http://valleypainclinic.org/userfiles/file/31542184768.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/57808482845.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/97265823908.pdfIn PDF document text
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210608_520DDFEEF42226AC.pdfIn PDF document text
    • http://bollywoodsalonskokie.com/admin/images/file/19198035445.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160833b2ab3bab---nusidisowatoxemukak.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f88cbcaebe---16174660341.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16094b97e81a82---bulovakikevamitesojaweje.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/92f271d8cd09b0adc46b5b31c35d8ec6/33251565262.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D46 4080 bytes
SHA-256: 27468081aa5c247b353c09845f77a472625a9c730b43f335eb681c4231b2a30b
font_01_sfnt_off00011b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1B 10708 bytes
SHA-256: 73762415a79c8c1aa87c2fe71312d3b492843534bc29a98cec6d77fd8ea12eba
font_02_sfnt_off00013f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F88 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230