Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d7a6542ee410eb1…

MALICIOUS

PDF

76.7 KB Created: 2021-03-24 15:55:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: df25884841f4f1a2236cdcf63d90a948 SHA-1: e28c6c5105fb6c65ce47db45f30971b7f556d867 SHA-256: 9d7a6542ee410eb1f4973b9a601195be60e192edaa60f17e2b4374f83a26dd81
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The embedded URLs are likely used to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://lozipotod.ru/strik?utm_term=mars+and+venus+on+a+date PDF link annotation
    • http://zuzorovix.scienceontheweb.net/soduxoliluvenikivaxasape.pdfIn PDF document text
    • https://suzeziji.weebly.com/uploads/1/3/0/7/130739492/gikip_pemibebu_vogidane_nodapir.pdfIn PDF document text
    • http://warewakeb.sportsontheweb.net/fefonidufowob.pdfIn PDF document text
    • http://rijigikesezaga.mypressonline.com/angle_between_two_lines.pdfIn PDF document text
    • https://woluxubofij.weebly.com/uploads/1/3/1/3/131383763/rukadizorew.pdfIn PDF document text
    • https://wedabivugexum.weebly.com/uploads/1/3/0/9/130968949/c56fae550c068.pdfIn PDF document text
    • http://vikolumubibo.scienceontheweb.net/editing_text_in_photoshop.pdfIn PDF document text
    • http://xuxodowenam.getenjoyment.net/automatic_car_covering_system.pdfIn PDF document text
    • http://ninotekega.mygamesonline.org/81178473808.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6843e3eb-5573-46e1-90a0-370cfc2b4a0d.filesusr.com/ugd/89b1bc_17c2e27b435c4fb29efdf5f2f483099c.pdf?index=trueIn PDF document text
    • http://pigutun.myartsonline.com/bolepegogo.pdfIn PDF document text
    • https://bc3ee532-4344-4262-9f0b-d8353e2229a5.filesusr.com/ugd/6ca3f6_8e1620253ee24ef38b96a6f5bed4d08f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lefemijip/performance_auto_parts_ottawa_ontario.pdfIn PDF document text
    • https://5548a280-a194-4776-8019-0e256783c1fa.filesusr.com/ugd/f2c1dc_be0ed9383ace4d92a8db5a82b591dc7d.pdf?index=trueIn PDF document text
    • http://gumizaxewa.atwebpages.com/jigulixuvapesobejuj.pdfIn PDF document text
    • https://b724dda4-e2e0-47c5-811c-ae3b7273578b.filesusr.com/ugd/a1e5ee_aeabbb5eee3847c59834f8e59506d210.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/powerpoint_countdown_timer_template_free.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_off0000eea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA3 4852 bytes
SHA-256: e577479e12cce108dc07bb3c05d6db5e69df483251d3ee848212acb1ad774b55
font_01_sfnt_off0000ff3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3F 11648 bytes
SHA-256: 6d1893fc6b5ad589bb9038864b194668d0cd11f7b6eb529e56c248448d5e0a11

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