Malicious PDF — malware analysis report

Static analysis result for SHA-256 11db160fd7a0da0a…

MALICIOUS

PDF

85.9 KB Created: 2021-02-16 00:01:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6e4368e8364b6bf7995f285276a67453 SHA-1: ca03d5c3431568c66f5f5095b581cf93f952a1f6 SHA-256: 11db160fd7a0da0afbdbc7fccd343675bd2b1ccb1cb401f23ab068c44bc7963d
126 Risk Score

Malware Insights

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

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 0.9998

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://crophysi.ru/strik?utm_term=bolens+140cc+lawn+mower+carburetor PDF link annotation
    • https://cdn.sqhk.co/wevavagu/hgj6qhG/57842718558.pdfIn PDF document text
    • https://luxoxika.weebly.com/uploads/1/3/4/8/134899107/b64a94.pdfIn PDF document text
    • https://jiparebifipi.weebly.com/uploads/1/3/4/6/134638028/7897868.pdfIn PDF document text
    • https://simepatu.weebly.com/uploads/1/3/4/2/134267103/36eb71d67c30182.pdfIn PDF document text
    • http://getveran.site/schott_ceran_induction_hob_wont_turn_on11c4z.pdfIn PDF document text
    • https://cdn.sqhk.co/mubafazus/hcjjidj/66209333851.pdfIn PDF document text
    • https://muxajugukeso.weebly.com/uploads/1/3/1/4/131453177/c87207c9.pdfIn PDF document text
    • https://muwegegedagus.weebly.com/uploads/1/3/0/7/130738526/vulevetokegu-bozatuzatuf-sewuvufeveze-zinor.pdfIn PDF document text
    • http://fitit.space/7132286185180mdo.pdfIn PDF document text
    • https://cdn.sqhk.co/zumufapofow/jgeOWhh/foosball_winner_slingshot_game_rules.pdfIn PDF document text
    • https://lilalosemojuwo.weebly.com/uploads/1/3/0/8/130814601/fanixilatelef_powegiroxa.pdfIn PDF document text
    • http://vpntop.info/54617596311bk299.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/nitizobuv/free_whatsapp_wedding_invitation_templates_after_effects.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/jekogitesewidefimawiti.pdfIn PDF document text
    • https://s3.amazonaws.com/kovibu/apocalypto_full_movie_online.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/kdoqi_guidelines_hemodialysis_nutrition.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_off00011224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11224 5508 bytes
SHA-256: 1ab59a9a5f8f926c5923e147587c5c72e57b07e273d12df62394e8792d02a2e8
font_01_sfnt_off000124e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E9 10944 bytes
SHA-256: 8ddf787c4e7fa09ac1601c49cf14fd8044101c0716c47916f103d87d23a02743

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