Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6a8b947c342ba16…

MALICIOUS

PDF

71.2 KB Created: 2021-03-02 22:24:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: bea932c93e2ff62b0004bb4ec801af05 SHA-1: 44e6362ee88d5d2e89a27879bf571b0df37edbdf SHA-256: a6a8b947c342ba16d79399a84ddc8e51cfc69131c2e266ff3d5ce9d7a7385010
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers strongly indicate maliciousness, with a specific detection of 'Pdf.Phishing.Trojan'. The embedded URLs suggest a phishing or malicious redirection attempt, likely to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://baarspo.ru/award?keyword=how+to+connect+bluetooth+bose+earbuds PDF link annotation
    • https://nulaxevaximuji.weebly.com/uploads/1/3/0/7/130776814/luxoxepe.pdfIn PDF document text
    • https://cdn.sqhk.co/fipufose/IhiVpig/moruriva.pdfIn PDF document text
    • https://cdn.sqhk.co/giwitosak/jW7gk5m/70890614325.pdfIn PDF document text
    • https://cdn.sqhk.co/sixepatexup/Y8NuSzT/74349941938.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/pQhjhLc/pencilmation_3_coloring_book.pdfIn PDF document text
    • https://gimoxawoja.weebly.com/uploads/1/3/1/3/131380550/nezixoxora.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/67477660174.pdfIn PDF document text
    • https://wadewasugidaf.weebly.com/uploads/1/3/0/7/130775384/rigaxasepe_japusudime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407084/normal_60315fe2aac4b.pdfIn PDF document text
    • https://vokarojunez.weebly.com/uploads/1/3/2/6/132696330/dopoz-pavubowe-lusazizeturuw.pdfIn PDF document text
    • http://mikazuxo.mypressonline.com/vogajanizunuwaganetajix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471082/normal_5ff45f48f171b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://botovomevagexe.epizy.com/imslp._org_free_sheet_music.pdfIn PDF document text
    • http://puxakuxuvon.epizy.com/autism_guide_dogs.pdfIn PDF document text
    • http://rodumotafab.rf.gd/applied_machine_learning_in_python_reddit.pdfIn PDF document text
    • http://xuxevimikari.rf.gd/zidanamexizezutawoz.pdfIn PDF document text
    • http://dudulexo.epizy.com/51143154747.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_off0000dbbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBB 5220 bytes
SHA-256: 6f0b6b80d8bcd6209fd599ff24289188ec0a43ddd4dfd76847dadc040a634632
font_01_sfnt_off0000ed80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED80 10032 bytes
SHA-256: b957f65dbb34657277687b5eb69299ec69bb57e7be7713a918e2e171316fb583

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