Malicious PDF — malware analysis report

Static analysis result for SHA-256 e76f7904557a87e7…

MALICIOUS

PDF

62.5 KB Created: 2020-11-30 15:46:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7e861ef3e004bf0736de59682fadccee SHA-1: 0a86e11a5d9a0020a1a41cb95def06357bc59bd0 SHA-256: e76f7904557a87e7016cc3a8add0d9bea586f8e72258f0c2397a292a226f299d
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by multiple heuristics and an ML classifier, including critical detections for malicious redirector links and a link farm. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting an attempt to direct users to malicious or phishing sites. The presence of a link farm indicates a likely SEO manipulation or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gettraff.ru/strik?utm_term=as+i+went+down+to+the+river+to+pray+chords In PDF document text
    • https://rutobugexamaxip.weebly.com/uploads/1/3/4/5/134508198/8986028.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389823/normal_5f974952e1c14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392660/normal_5f98f0af45847.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/nojof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450042/normal_5fa314b8a3108.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446289/normal_5fbb5bff14768.pdfIn PDF document text
    • https://luwiritogejoti.weebly.com/uploads/1/3/4/2/134266422/7110082.pdfIn PDF document text
    • https://bujerawesu.weebly.com/uploads/1/3/4/4/134438781/45cfa2f0aff5a57.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/924405cb8ca788a.pdfIn PDF document text
    • https://ganevofetenigul.weebly.com/uploads/1/3/4/8/134893119/1842217.pdfIn PDF document text
    • https://kilekawu.weebly.com/uploads/1/3/4/8/134857711/majejamuzumuson-jofejes.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/ce0cb2b.pdfIn PDF document text
    • https://sigoxavofilaza.weebly.com/uploads/1/3/4/6/134697452/3299244.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/rixevozajixezos/vigosilonezafewanirosupa.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/67107723654.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_off0000b805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB805 5372 bytes
SHA-256: 2bd9c8473b9e0aeb6bef188dcf6466749de4c84a31282f76f5fb4ced30e5edd6
font_01_sfnt_off0000ca60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA60 10204 bytes
SHA-256: f5ee22674022473ac78a796b9912f4043e30fd965fb55fbf4a77a8db5340a284

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