Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06d57e524d9fab5…

MALICIOUS

PDF

63.3 KB Created: 2021-01-11 09:47:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 432d15cf787650e27c8a4c59b81a6ed4 SHA-1: 51569b2a35cdeccfffbc4ad627329a45570eac24 SHA-256: d06d57e524d9fab52a402b39bccff145fa7b4ddfcf91e4b3b110c0f944393fa9
146 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or tech-support scam. The heuristic 'SE_CALLBACK_LURE' indicates the document likely prompts the user to call a phone number under a pretext of a billing or security issue. While no scripts were explicitly extracted, the presence of external URIs and the overall structure suggest it may attempt to redirect users to malicious sites or initiate further malicious actions, potentially leveraging embedded JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://trafffe.ru/aws?utm_term=anglo+link+tenses+pdf PDF link annotation
    • https://gifaxopolipo.weebly.com/uploads/1/3/0/7/130739444/bezezito.pdfIn PDF document text
    • https://cdn.sqhk.co/kunutewiwit/thaHdjh/color_fill_3d_game_online.pdfIn PDF document text
    • https://cdn.sqhk.co/wajuvimavofo/ecHggpr/46959823743.pdfIn PDF document text
    • https://naxulukituno.weebly.com/uploads/1/3/4/8/134879135/168e83bbc5a.pdfIn PDF document text
    • https://site-1180454.mozfiles.com/files/1180454/cancel_livephish_plus.pdfIn PDF document text
    • https://bapijinujaf.weebly.com/uploads/1/3/4/7/134700097/sadoveseronitud.pdfIn PDF document text
    • https://site-1192441.mozfiles.com/files/1192441/mind_games_meaning_john_lennon.pdfIn PDF document text
    • https://site-1178488.mozfiles.com/files/1178488/lowe_s_store_hours_on_sunday.pdfIn PDF document text
    • https://gororumemi.weebly.com/uploads/1/3/4/5/134517819/290305.pdfIn PDF document text
    • https://site-1084247.mozfiles.com/files/1084247/87772831255.pdfIn PDF document text
    • https://zopogunonezaso.weebly.com/uploads/1/3/1/6/131637395/78458c.pdfIn PDF document text
    • https://kuxelozipapim.weebly.com/uploads/1/3/1/8/131871637/c8766.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wovigebi/wijakozikinixut.pdfIn PDF document text
    • https://s3.amazonaws.com/nepawigexa/xogigibusanurimukixeda.pdfIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC4D 4956 bytes
SHA-256: 67e9962df8c14cddb1e63b20184bf7f87141a97d04bda1ad0bdd46dc1114a385
font_01_sfnt_off0000cd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD50 10300 bytes
SHA-256: 1817ba0b03bd395e28009c54d9a6df1435dd0241beeda31607d186d461e433f6

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