Malicious PDF — malware analysis report

Static analysis result for SHA-256 878c4a37b31f3672…

MALICIOUS

PDF

77.3 KB Created: 2021-02-16 03:09:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 7ea32f378a7cc9f134081b3f679cf32c SHA-1: 67396b80510dac6cb8c7da793beb5c4782c34485 SHA-256: 878c4a37b31f3672779c8acd43eae3a4b02a4bcea9bb71ba92808db6b362166d
136 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 by multiple heuristics, including ClamAV and an ML classifier, as malicious phishing content. The document contains an embedded URI and an image lure that redirects to the URL https://maypoin.ru/strik. This URL is likely used to distribute further malicious content or conduct phishing operations.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://maypoin.ru/strik?utm_term=the+cat+in+the+hat+comes+back+beginner+book+video PDF link annotation
    • http://drovazvenigorod.ru/ejercicios_de_valores_del_secq36u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444369/normal_602162d915cad.pdfIn PDF document text
    • http://ludshop.xyz/sobovijafavuxezalib78k5v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391954/normal_6008fd3c2b1ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387235/normal_5fcc99ff99e2f.pdfIn PDF document text
    • http://gratoraama.space/516735605w2o7w.pdfIn PDF document text
    • http://topsale.pro/ketodunifokijuw7ae6m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480594/normal_600978810c8a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451563/normal_6004b02fae52b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387411/normal_602b0f3db24e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423166/normal_5fe9cce3c78c5.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/jepinebawo/sorunonefiripupoliroxoma.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/beckett_oil_burner_rwb_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/meruvuxulaparexogilufami.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/32123168129.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/42992700028.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/bansuri_flute_music.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/lesson_plan_templates_for_elementary.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/86361320773.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/66603555433.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_off0000eff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF6 5532 bytes
SHA-256: a32829e1887aced03d798f2b71f182899dca28242e87118413d02b57f36a6c20
font_01_sfnt_off0001029f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029F 11064 bytes
SHA-256: d238b7f481194624f78f779a889b7977d9e9b06f7af9bfd49061ee553d46c7d1

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