Malicious PDF — malware analysis report

Static analysis result for SHA-256 d269a2476dc0f39f…

MALICIOUS

PDF

71.0 KB Created: 2021-06-13 17:14:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 65163fff107476a7b3ed3777b17cc64c SHA-1: aa65e1de83ef9f5174d4d50f77d5f28a0712f569 SHA-256: d269a2476dc0f39f9579b994122075f4350ad93cd6d2f35324a735b1b6907af1
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or phishing sites. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver malicious payloads or lead users to phishing pages.

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
  • 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://pixomot.ru/pbw?utm_term=complete+calvin+and+hobbes+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406202/normal_604f49d719381.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375351/normal_602de7d1b45cd.pdfIn PDF document text
    • https://nefadojajekewa.weebly.com/uploads/1/3/0/8/130874163/145138c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404740/normal_5fd3692d86b9b.pdfIn PDF document text
    • https://kujiguvasate.weebly.com/uploads/1/3/4/5/134584602/xojetutulawake.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xalanupuzewo.pbworks.com/w/file/fetch/144423183/67756179230.pdfIn PDF document text
    • http://zeratuwolima.pbworks.com/w/file/fetch/145109544/viwusekiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcecab79-05a7-4569-b74f-8834d39cdbb0/type_2_diabetes_statistics_australia.pdfIn PDF document text
    • http://bomasasawavi.pbworks.com/f/roblox_level_7_exploit_download.pdfIn PDF document text
    • http://kigemulu.pbworks.com/f/what_does_favorite_color_yellow_mean.pdfIn PDF document text
    • http://zupelapowi.pbworks.com/f/xapugunojudojoxixopuxuw.pdfIn PDF document text
    • http://wijozuzapusa.pbworks.com/f/317554295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c8624ae-4a38-4c4f-aa11-5229d13ce402/litarinos.pdfIn PDF document text
    • http://vevokofeju.pbworks.com/f/xikutavuwixukedagurefiwa.pdfIn PDF document text
    • http://jifesepapo.pbworks.com/f/gojefakinepamin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c11e6fde-b65e-49dc-bf45-ee1ee4bd2409/linksys_ac1200_quick_installation_guide.pdfIn PDF document text
    • http://kalunagepigi.pbworks.com/f/30613937550.pdfIn PDF document text
    • http://fisojun.pbworks.com/w/file/fetch/145049016/37979457148.pdfIn PDF document text
    • http://rupebaxo.pbworks.com/f/shaman_leveling_guide_wotlk.pdfIn PDF document text
    • http://lekuzax.pbworks.com/w/file/fetch/144418500/rosovividositubali.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_off0000d7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DF 5404 bytes
SHA-256: d3559602c5bd12b3e7dfaa7540cc1b6353850160da34b615a2dc8bd529a45e53
font_01_sfnt_off0000ea1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1A 10860 bytes
SHA-256: 0c164bfc35494b8431f4f8fbb2110e85ae2c95362bb6efcdd2a052a786daa33d

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