Malicious PDF — malware analysis report

Static analysis result for SHA-256 db4ec155395a3b3f…

MALICIOUS

PDF

82.6 KB Created: 2021-02-08 23:06:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: f173ea88663495af66cb801a91b88f6c SHA-1: 436e8b5dd12ea0dc3f9932fb35e625459ab40307 SHA-256: db4ec155395a3b3f650ae7bd8f159656570db7d79bd3403f2a0712c4b96c72d1
226 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document exhibits characteristics of an advance-fee scam, as indicated by the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic. It contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted, but the presence of embedded URLs and the link farm structure points towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • 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://crophysi.ru/123?utm_term=clash+of+queens+mod+apk+2018 PDF link annotation
    • https://zukutalemuz.weebly.com/uploads/1/3/4/5/134582669/71a003b124.pdfIn PDF document text
    • http://ledy66.net/gravitrax_expansion_trampolinex11b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427811/normal_601f1dcaba608.pdfIn PDF document text
    • http://italiahot.fun/jspdf_autotable_font_size8zkv7.pdfIn PDF document text
    • https://firulozide.weebly.com/uploads/1/3/0/7/130775295/4320608.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447916/normal_5ff3ed8083575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468572/normal_5fd8d347eef9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451375/normal_6013166333f73.pdfIn PDF document text
    • http://new-leggins.site/73593779528os9gr.pdfIn PDF document text
    • https://dugigoje.weebly.com/uploads/1/3/4/7/134754128/kubal_wuvaxanotasil_mubupiti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379618/normal_600dd952c25b3.pdfIn PDF document text
    • http://shoop-ff.ru/ninja_blender_vegetable_slicer16fs8.pdfIn PDF document text
    • http://erethiztzj.space/6471433786ga1xc.pdfIn PDF document text
    • http://particulieres-societegenerale.best/45090386092xj94g.pdfIn PDF document text
    • http://outputqwvk.space/52214519392mm1gg.pdfIn PDF document text
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/varugasikidosoxemi.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_off000104c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C3 5800 bytes
SHA-256: 9126f98956328e94521a87bac57eec3c69c01d8ad596e24d3669cac3a8d7adf0
font_01_sfnt_off00011863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11863 10920 bytes
SHA-256: 087423c726c061441ffa32971735346aea2d24fe8d9256dee65ff0efe7c3800a

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