Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf0cac92b214b54…

MALICIOUS

PDF

95.8 KB Created: 2021-04-21 11:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: aa3fa8db8c67d0f9c8508bedceb8bc74 SHA-1: 5845c8534bfa371dacb372213c0faf9db0d1c3d9 SHA-256: bdf0cac92b214b542708861b5351b07b819956cdc54426d3617770a89da56087
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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.
  • 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://pelibifir.ru/strik?utm_term=obdlink+lx+vs+mx PDF link annotation
    • https://zediruli.weebly.com/uploads/1/3/4/7/134725524/fifatavexor.pdfIn PDF document text
    • https://ludilejufa.weebly.com/uploads/1/3/5/3/135347725/jorasovut.pdfIn PDF document text
    • https://penopamez.weebly.com/uploads/1/3/4/4/134496097/nesefafetawukijo.pdfIn PDF document text
    • https://cdn.sqhk.co/torujazelome/hiv4rgh/islands_menu_gluten_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nozedimasav/hcIgir6/54264163874.pdfIn PDF document text
    • https://fuwozubasuzej.weebly.com/uploads/1/3/4/4/134473550/wajolokipavomikojed.pdfIn PDF document text
    • https://cdn.sqhk.co/guledijuxi/jjziaF4/20621582776.pdfIn PDF document text
    • https://kugibiredatejag.weebly.com/uploads/1/3/4/3/134319346/534a761a39f.pdfIn PDF document text
    • https://cdn.sqhk.co/takodabu/jbD4ajc/fipofesuzutatiwimuzi.pdfIn PDF document text
    • https://gifolavetufo.weebly.com/uploads/1/3/2/6/132695571/872595.pdfIn PDF document text
    • https://cdn.sqhk.co/xafeperale/dpwgehg/sofifimobaropesuv.pdfIn PDF document text
    • https://limorevoxa.weebly.com/uploads/1/3/4/6/134611026/gixavowunilam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/windows_7_ultimate_64_bit_torrent_download_full_version.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/topimidinumivuba.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/jexomin.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/gejenugilelakuninokax.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/derecho_romano_juan_iglesias.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/29727140644.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/51438947443.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/todepelaziluvufora.pdfIn PDF document text
    • https://s3.amazonaws.com/mosezavor/rofiwez.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/watch_action_movies_free_online_without_ing.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001274c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274C 4504 bytes
SHA-256: d1aa81846b0d65903ea34a7a658c1ba948a8619d1213591ae2f26d21c63c59cd
font_01_sfnt_off00013669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13669 13748 bytes
SHA-256: 414dfdbb86ba6f1dfee89663bb254b338196d60a9ee4b8407ece22f31ccfc049
font_02_sfnt_off000163db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163DB 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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