Malicious PDF — malware analysis report

Static analysis result for SHA-256 090f6d056f1ad4af…

MALICIOUS

PDF

81.4 KB Created: 2021-03-22 09:23:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 82b7ed15d4484a249e1ea7be38db033b SHA-1: 8e99041d0603e7bc8995e0cf4f8b229e075b0f76 SHA-256: 090f6d056f1ad4af7fbad5110e07640cf5d6667756ab07eb816d06cd36e2e53a
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 0.9996

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://jacksth.ru/123?utm_term=black+origins+of+ancient+greek+civilization+pdf PDF link annotation
    • https://cdn.sqhk.co/xujurovemu/iiiEiP6/rojebepubeludun.pdfIn PDF document text
    • http://indir-kazan.com/naruto_shippuden_episode_138_englishzp05g.pdfIn PDF document text
    • https://denafeferigo.weebly.com/uploads/1/3/0/8/130874231/d80d3a0eefb93.pdfIn PDF document text
    • https://cdn.sqhk.co/pobijejok/VhiaCQp/517692002.pdfIn PDF document text
    • https://guzaxogovi.weebly.com/uploads/1/3/4/6/134651677/saniranorezumuzogek.pdfIn PDF document text
    • https://dodivivedi.weebly.com/uploads/1/3/3/9/133997878/tugew-kafabubim-danobuzuj.pdfIn PDF document text
    • http://pukogika.iblogger.org/50750382384.pdfIn PDF document text
    • http://dedezitomurepu.iblogger.org/how_to_charge_the_jackery_bolt.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/seKiihe/shooting_range_sniper_target_shooting_games_free.pdfIn PDF document text
    • https://cdn.sqhk.co/vefoveted/ajjvEMc/lebapofisojuzabakotosebi.pdfIn PDF document text
    • https://cdn.sqhk.co/nanagajog/QNhiigZ/89349152297.pdfIn PDF document text
    • http://help-bluebadgecustomer.com/93724396097m2t71.pdfIn PDF document text
    • https://litepuvib.weebly.com/uploads/1/3/4/7/134741427/be4e7f.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/xulikamul/susotagapazorevalemipaz.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/citrix_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/lugaxivarozujojab.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/mevekumefukoler.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/android_os_watches_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/minn_kota_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/38204374566.pdfIn PDF document text
    • http://wojemegakal.rf.gd/accommodate_sentence_formation.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/media_player_notification_android_studio.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_off0000ff94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF94 5548 bytes
SHA-256: 99ad7869261ab6a29e76a8c348557f0d4e73face6d6b4de900f263fee7682faf
font_01_sfnt_off000112a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A6 10896 bytes
SHA-256: 3b7dcaab32f47c06447d8c1c891555abe5755c96880a921bf7d00699129f5ac0

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