Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e70274af073ec36…

MALICIOUS

PDF

72.4 KB Created: 2021-04-18 18:36:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e57bd1f6375e0d9b3c343b5338c66925 SHA-1: 55b287c7d6ac76b43f4c770bf801d8875feec285 SHA-256: 7e70274af073ec367c7839cd2073698d96ce1cd050edb61478cb7717418fb4a5
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 0.9998

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://xajibur.ru/strik?utm_term=dr+zhivago+2002+movie+online+free PDF link annotation
    • https://safipeta.weebly.com/uploads/1/3/1/4/131408280/e615f6a84.pdfIn PDF document text
    • https://sodipojemip.weebly.com/uploads/1/3/5/3/135325099/3037794.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379973/normal_601e891220c7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413583/normal_60143d89f1a99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424013/normal_605ab67654e6a.pdfIn PDF document text
    • http://winclean-shop.space/kibogisusekudofivagalewiko12ei.pdfIn PDF document text
    • https://fuxogadukuka.weebly.com/uploads/1/3/4/6/134688721/3046428.pdfIn PDF document text
    • http://ipai.online/finudusisomavawevupmdmt.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/amortization_schedule_calculator85roj.pdfIn PDF document text
    • https://juxagoneponux.weebly.com/uploads/1/3/1/3/131384300/gogopuzuboxe_disepaz_wegoso_dazotinetaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489713/normal_60616de6dab46.pdfIn PDF document text
    • https://womegirig.weebly.com/uploads/1/3/4/5/134506381/lupekexuruxu-boderapajake.pdfIn PDF document text
    • https://tevoletefe.weebly.com/uploads/1/3/1/6/131606261/totiwu.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/dubiditiginowo/ap_language_and_composition_sample_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/727ca15d-4d6a-485b-a2bf-63db834ddaa6/how_to_start_coleman_powermate_10_hp_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/gst_calculator_india_for_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/191c11f3-8dfc-4d51-ae24-99eef5a9caa6/kx_250_price_in_south_africa.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_off0000de28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE28 5384 bytes
SHA-256: bfd1087093a7e4fac9c0410dd4991a4e32d6d76b2de67225ad953ed1f67089b8
font_01_sfnt_off0000f068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF068 10400 bytes
SHA-256: 78b775deed8ab15f30fc8e76cf9046e6fd5080c4182f9e3c6a02498ddf3eeced

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