Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcbe30e80d77237c…

MALICIOUS

PDF

70.3 KB Created: 2020-12-03 08:23:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8660cd164cec60a28dd327f763f4404e SHA-1: 3b9dccfcf2a837ad27043beabcc520f5f917e99f SHA-256: bcbe30e80d77237c1c2ab1c0410fb0523f199382353a89aced05ed819f9efbc2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link pointing to 'trafffi.ru', suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffi.ru/123?utm_term=carter+g+woodson+miseducation+of+the+negro+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448129/normal_5fbc6f5912c98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485443/normal_5fba7431cec18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372087/normal_5fbe9872ccf58.pdfIn PDF document text
    • https://gimelukisisira.weebly.com/uploads/1/3/4/0/134040832/gurabubasonum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460982/normal_5fbe3caf63a20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485014/normal_5fc47bc7bc83b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbceea029c5e26690247cad/1606217380274/womikejelewepigaw.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/list_of_abstract_nouns_from_adjectives.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/zuvevajivasuj.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/95784628882.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c51f8787e8798984abf3/t/5fc70089a3696915e219e0e7/1606877321912/grand_street_racing_tour_gsrt.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_off0000d51e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51E 5536 bytes
SHA-256: f825facf0802cd64deb188ac306460e3a24f0afb379bce38b8cc1fb5cbecac20
font_01_sfnt_off0000e7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DD 10740 bytes
SHA-256: 1d13ed78201395fe7f7f36e8c8beea80615b02845063f91358c922e61d7083a9

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