Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c5d842b9cf41b0a…

MALICIOUS

PDF

77.0 KB Created: 2021-04-07 01:17:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4c1e527596235d1d72e9b581e23e7c4f SHA-1: 3abf3d8712af75bc765816424d1b04ccc09f8dd0 SHA-256: 5c5d842b9cf41b0a077d6b669404732d62d585135e39ece0cb887d00859d7efd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9995

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://ponafet.ru/strik?utm_term=yoga+mudrasana+meaning PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495391/normal_6029dced82528.pdfIn PDF document text
    • http://goxezidoge.22web.org/segonedafizumirusesibesa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490934/normal_5fd1c11ff2b16.pdfIn PDF document text
    • https://cdn.sqhk.co/siloneza/cfjgPMn/venugalofagezabijap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383149/normal_604a80f726d8b.pdfIn PDF document text
    • https://cdn.sqhk.co/lomasamube/gcW1ijp/saxasejijakaf.pdfIn PDF document text
    • http://xubanapirobula.mypressonline.com/gaboforawowegakanazogukuj.pdfIn PDF document text
    • http://gomunawuwox.22web.org/the_economist_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/zonakagud/hjyWKji/video_chase_tag_championship_final.pdfIn PDF document text
    • https://cdn.sqhk.co/javabufe/ahdjdgi/64612363952.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451049/normal_5ff38e8f8726e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4c6480a9-ccec-4c20-853c-cc48681c44ad.filesusr.com/ugd/935adc_2189c31b4d97488c8d253a7aea2b533b.pdf?index=trueIn PDF document text
    • http://fevoreselo.epizy.com/assassin_s_creed_1_pc_game_compressed.pdfIn PDF document text
    • https://141ebdc9-a3c9-4c6d-b8f9-366dbf139dec.filesusr.com/ugd/46bfb0_b487cab08cce49e2a3b430d8a60520d7.pdf?index=trueIn PDF document text
    • http://dipijiz.epizy.com/31307297278.pdfIn PDF document text
    • http://lavaderajomu.rf.gd/how_to_change_yarn_colors_when_loom_knitting.pdfIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_2d684e955117494184cc17ee16188b11.pdf?index=trueIn PDF document text
    • http://benamow.myartsonline.com/larimijanifezovebodanelo.pdfIn PDF document text
    • http://nabesazuxipuf.epizy.com/divod.pdfIn PDF document text
    • https://409b2d23-5c1d-402e-97df-26c0da9299b0.filesusr.com/ugd/2e3d42_49d6806c06794f99af13f110d04fe751.pdf?index=trueIn PDF document text
    • https://c06d174a-caca-4ab2-b5a0-4525cd3135d4.filesusr.com/ugd/856cea_278d3c26935445078871a61e572f114d.pdf?index=trueIn PDF document text
    • http://xegilejefaga.epizy.com/consonant_sounds.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_off0000f181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF181 5076 bytes
SHA-256: a453769e70947af8ffeed4c7f97c8c2ba363ecff62f99a4e7e077c2224ea2501
font_01_sfnt_off000102ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AB 10480 bytes
SHA-256: 67ec9cf25354e46045ee57d55618ce8d867d99e0f8cbe564708a933bf98a60e2

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