Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14afe4179660ce5…

MALICIOUS

PDF

63.9 KB Created: 2021-01-06 23:47:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e7a9bd442c6363e29e4ea00e3f54ba50 SHA-1: d30eb54334c7d10892450e99205cee9d476a00e3 SHA-256: e14afe4179660ce5626851a4081f96f4d47789b2aae2c9d6194b9724400c4064
244 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and flagged as malicious redirectors. The document body, though corrupted, suggests a lure related to assembly instructions, which is a common tactic for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent.

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://traffmen.ru/123?utm_term=universal+broadmoore+king+storage+bed+assembly+instructions In PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/retus_nivof_rowepezise_dipole.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/e5bcd2697.pdfIn PDF document text
    • https://vopasigujar.weebly.com/uploads/1/3/0/8/130813381/tirexuzifupujovof.pdfIn PDF document text
    • https://mabufome.weebly.com/uploads/1/3/4/8/134880487/9a610.pdfIn PDF document text
    • https://fekujerixotose.weebly.com/uploads/1/3/4/8/134896765/xabowef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368972/normal_5fd722c7531f0.pdfIn PDF document text
    • https://zogumunatol.weebly.com/uploads/1/3/1/6/131636745/8387599.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402948/normal_5fa3010838622.pdfIn PDF document text
    • https://tigisara.weebly.com/uploads/1/3/4/6/134651617/zunukubokejowetofiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388163/normal_5f8f1fa32fa8c.pdfIn PDF document text
    • https://tiwamufeg.weebly.com/uploads/1/3/1/8/131871705/7850037.pdfIn PDF document text
    • https://fapasinexiri.weebly.com/uploads/1/3/4/3/134346339/4397191.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d372d8c4-ff95-4b56-bf8a-ab43605cc616/memofetiruwurilosazofu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d851fe8-c845-4c04-bb1a-d317137003f3/wheel_horse_parts_near_me.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_off0000b74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB74A 5616 bytes
SHA-256: 90a6731a264e3ad2ce3b2fe6b7415734ba365bda8d9af4218ebc5342e444af3b
font_01_sfnt_off0000ca5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA5E 11232 bytes
SHA-256: b24aa321f8e0fb70abc513c0f5fa382a396e6ea122920529f33778ea13b4f34f

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