Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f1a474a815a987d…

MALICIOUS

PDF

71.0 KB Created: 2021-02-16 05:09:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: d831e993a5cb0fcde168c26de56f2aa5 SHA-1: 19f31f9057077cf4ed6df44576d8c60dbc8da412 SHA-256: 2f1a474a815a987df6229c5986849e6eef90653acc37fcbf99867529773a8024
196 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, using lures related to awards and commissions to entice users. It contains a significant number of external links, likely part of a link farm to improve SEO or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, and the presence of embedded URLs suggests the document is designed to redirect users to potentially harmful sites.

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 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://bologen.ru/wix?keyword=awards+notification+commission+in+kansas+city PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382638/normal_602244e4b3187.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405662/normal_5fd7c553a2457.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366346/normal_602907b35d372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366995/normal_5fd7d116cb91d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410727/normal_6028b37379878.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481067/normal_5fd3297aae465.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460944/normal_60193094c4769.pdfIn PDF document text
    • https://nupepapuk.weebly.com/uploads/1/3/1/4/131484133/5759255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415327/normal_5fd793717650a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454545/normal_600b7c4e2b4b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403684/normal_5fe19ee0ab236.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376098/normal_5fd18560b7fdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457881/normal_5fe8108c5389f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414688/normal_5fcddd2e40e43.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/rakabexozu/26830504935.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/battleground_game_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/susupukorimukesenajugofog.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/57238413549.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_off0000d6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DF 5384 bytes
SHA-256: 1a5d0bdbf85663d66c50bef57e9b403536dd100a7ded4e6c44a127fe613a83d6
font_01_sfnt_off0000e938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE938 10820 bytes
SHA-256: c56e66a7a6be4d2f2896dd6f865febbd1237e460773c97e5bf7fc9ead314c9a4

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