Malicious PDF — malware analysis report

Static analysis result for SHA-256 b456700bbf551160…

MALICIOUS

PDF

72.7 KB Created: 2021-04-03 12:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f355bb192fddcea5c50adc4e8150f79 SHA-1: 6e22f5775b1de8bac5422fa3327a3b105479d12c SHA-256: b456700bbf551160d047fd26191921080278bf88cc0ec7b1b4449ba2504ed6a9
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, suggesting it is part of a link farm designed to redirect users to potentially harmful websites. The document body, though heavily obfuscated, contains metadata related to its creation, including a URL that appears to be a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/award?keyword=biodiversity+conservation+pdf+notes
    • https://bizudabug.weebly.com/uploads/1/3/4/7/134722823/ruvema.pdf
    • https://xalojuxovev.weebly.com/uploads/1/3/0/7/130774978/ziwuzajikutifo.pdf
    • https://static.s123-cdn-static.com/uploads/4445326/normal_5fe33e10255f9.pdf
    • https://kaxawoxo.weebly.com/uploads/1/3/1/0/131070710/5285319.pdf
    • https://lurotafimeka.weebly.com/uploads/1/3/0/7/130740015/8083bbcc8d.pdf
    • https://danigutido.weebly.com/uploads/1/3/1/1/131163693/d1c32b4f.pdf
    • https://losazutuliwuja.weebly.com/uploads/1/3/4/6/134622760/xoratunibokakixu.pdf
    • https://static.s123-cdn-static.com/uploads/4413000/normal_5ff287f8a2df0.pdf
    • https://cdn-cms.f-static.net/uploads/4473651/normal_603120145bdb0.pdf
    • https://cdn.sqhk.co/letarezetap/CqLhfN7/localizar_mi_android_por_gps.pdf
    • https://cdn.sqhk.co/lokojagivel/mIgjhei/rubirusidukinav.pdf
    • https://cdn.sqhk.co/kuxixixixi/Tajgjiw/atomic_bomb_songs_free.pdf
    • https://motabuwupogofe.weebly.com/uploads/1/3/1/6/131607229/wifufopope.pdf
    • https://cdn.sqhk.co/devuzemalut/ig6Jt06/snowden_movie_review_rotten_tomatoes.pdf
    • https://kazajiti.weebly.com/uploads/1/3/4/4/134456981/8d1748f14d.pdf
    • https://cdn-cms.f-static.net/uploads/4501214/normal_605b5624e1185.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://23da7c74-6e14-424a-b22a-901aa35eafb1.filesusr.com/ugd/9cc572_81c08b0f4bb5474fbca8fb3674819755.pdf?index=true
    • https://18cb0a1d-3822-48a5-9ca0-56465202bc9b.filesusr.com/ugd/96564c_adbe7f36d32b43848b08d74c11bf5d23.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc0b.bin
12efff88c023bc33a5d2b06d9199b527f2833f35d128dff51c78b7cac889b32a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0B 5328 bytes
font_01_sfnt_off0000ee4b.bin
219e37c1b79b1f76d0ec1214bd5f44f5a3777f886a7de9049bbd7482692cba85		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4B 11108 bytes

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