Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6f2b0686587b590…

MALICIOUS

PDF

89.1 KB Created: 2021-03-30 07:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5e6325b83e83516550257ac253f8fb5d SHA-1: 25d76cff3f63640c6563a5fb6d3314d9b14625a7 SHA-256: a6f2b0686587b590434c89e2bae656ab37f19c7bcf30e1ebff8014e7a95b3928
126 Risk Score

Malware Insights

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

The file is a PDF containing numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to religious content, which is likely used as a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/strik?utm_term=rosario+dela+coronilla+dela+divina+misericordia+cantado+completo PDF link annotation
    • https://kupepepa.weebly.com/uploads/1/3/0/8/130874668/f61cd52.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/hiNO3yy/dragon_quest_dai_s_great_adventure_episode_1.pdfIn PDF document text
    • https://cdn.sqhk.co/bepesewutu/Eiegerp/call_of_cthulhu_dice_roller.pdfIn PDF document text
    • http://bellissimo.online/bozoxerimer27nn6.pdfIn PDF document text
    • https://kobizixudowizeb.weebly.com/uploads/1/3/4/4/134402546/vodetufil.pdfIn PDF document text
    • http://gajonedorebuko.mywebcommunity.org/google_cardboard_vr_headset_qr_code.pdfIn PDF document text
    • https://vejuxafesopekub.weebly.com/uploads/1/3/6/0/136010302/86344.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabudoxuwa/gqOZhiA/dolepefu.pdfIn PDF document text
    • http://pankreatitum.ru/384706395bmnq1.pdfIn PDF document text
    • https://wazafalesozem.weebly.com/uploads/1/3/4/4/134498636/86183.pdfIn PDF document text
    • http://igbusinessabouthelp.com/coffee_shop_equipment_3d_modelof46l.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilobup/i3hdeje/96528700474.pdfIn PDF document text
    • http://zumanidoxup.medianewsonline.com/92773662648.pdfIn PDF document text
    • https://luwojasog.weebly.com/uploads/1/3/1/3/131380471/c861af46d.pdfIn PDF document text
    • http://ridovise.sportsontheweb.net/acute_abdomen_articles.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
    • http://sekuwomexapa.myartsonline.com/34877905415.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/bixagimobosifazi.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/79142862266.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/34890291675.pdfIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/common_core_algebra_i_answer_keys.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1F 5072 bytes
SHA-256: fed073e33c57e7f223271b5857bb19e41836f50ef2f481fda5bcf0c4f5c2c183
font_01_sfnt_off00012045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12045 11688 bytes
SHA-256: 66d33ec09b9532a79cca864efc20c5fa4020a33c958664585cfcdcbd8ec35caf
font_02_sfnt_off00014657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14657 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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