Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e292e0f2da23b6a…

MALICIOUS

PDF

71.9 KB Created: 2020-11-12 17:40:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 604b0f42f6b16eeada6757248773bb5e SHA-1: dc7e7f92b4a5b7b3586372d94edeecc5eec8f9ad SHA-256: 7e292e0f2da23b6aa3e3eeed4cd6f786863e523666f9ffe8a69082246ee839d7
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://traffine.ru/123?utm_term=office+365+cutover+migration PDF link annotation
    • https://sobaxijuxoje.weebly.com/uploads/1/3/4/2/134235367/5043614.pdfIn PDF document text
    • https://xebikazogede.weebly.com/uploads/1/3/2/7/132740990/28fef585a7.pdfIn PDF document text
    • https://susetizumuru.weebly.com/uploads/1/3/4/4/134461935/3991537.pdfIn PDF document text
    • https://baloxojiregape.weebly.com/uploads/1/3/4/6/134685367/donuboxugusizuge.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/2d7adc.pdfIn PDF document text
    • https://palukenibimel.weebly.com/uploads/1/3/4/4/134401756/8190196.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/felasorarabipis/litedevanafumowibalod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/934914a1-8373-476e-abe7-0e155bd01e48/79964504996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/447f14fc-3104-4eee-8094-e8dcdff71d62/zuxudapenugenuzeporuvesex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27588728-6afd-4505-8c1b-a78814810f21/gefejavumisubaserepalakis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f7c252f-43e8-46b0-bb09-26464eb95f46/autocad_electrical_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/laminar_flow_equipment.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/alamo_drafthouse_avengers_endgame.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_off0000dcc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC2 5520 bytes
SHA-256: 149cae3a92757ff79304fc8a90f5aacb3a3f9c0c564c3dede9a9da21e09eb50a
font_01_sfnt_off0000ef80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF80 10340 bytes
SHA-256: 183940451eb1def0643599349701a3b1965f75c67f47848879539df459c61623

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