Malicious PDF — malware analysis report

Static analysis result for SHA-256 979b6b3ecf4d5692…

MALICIOUS

PDF

81.9 KB Created: 2021-02-24 19:19:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 0763bca17fa82a1a3fe2535f9d0b51d8 SHA-1: c400ea5b36fece6b2daf7fc007d1931f03ddfc50 SHA-256: 979b6b3ecf4d569207a185a0e55b9434bdd7807f41c67f85476c4357cdc7d1a6
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests it is part of a link farm designed to drive traffic to disposable hosting, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 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://yafferge.ru/award?keyword=axiom+pro+49+power+supply In PDF document text
    • https://gapefupekud.weebly.com/uploads/1/3/1/8/131871489/fininofedibimib.pdfIn PDF document text
    • http://ca-manalapan.space/21571498240i3a0w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488092/normal_5ff5fac44d65f.pdfIn PDF document text
    • http://vodabezoli.iblogger.org/rujelipinurike.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504788/normal_600fa56e4a857.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387219/normal_60154f938e27f.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/how_to_put_baby_in_graco_snugride_35.pdfIn PDF document text
    • http://fitokaps.xyz/secrets_of_the_wonderlic_test_study_guidewcxc6.pdfIn PDF document text
    • http://form-lnstagramverificationbadge.com/nigerian_nursery_school_curriculumz5qpz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449419/normal_6020287a9c976.pdfIn PDF document text
    • http://groby-ritual.online/26949658514s0iy1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385216/normal_5ffba440adc42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471985/normal_5ff8d82c4854c.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/89941308774.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/baxibegigokexanenaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10234 5252 bytes
SHA-256: f475125e5005baeabb875d441e9e2ccd02519b0f4420f87bf4a67137bfe366e4
font_01_sfnt_off0001141f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141F 10872 bytes
SHA-256: 3c5257beea3967dadc7514bbdb69719ed100fa0751d044f0fd8cb90d108fd9cc

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