Malicious PDF — malware analysis report

Static analysis result for SHA-256 3420f700fbb5e1f3…

MALICIOUS

PDF

70.7 KB Created: 2021-02-20 06:05:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d5100d3a62bc7a664c61913163f2ecfa SHA-1: 119a4b8d09daaf8fbeb09745d6606c07542a1a68 SHA-256: 3420f700fbb5e1f3c3241efea45f4291aafbafd8569af11d6de2b1299a6f8ad7
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://baarspo.ru/wix?keyword=steam+xbox+controller+guide+button PDF link annotation
    • https://cdn.sqhk.co/jisepozidis/ha7ifHH/jolaziwefefutoxajiruwava.pdfIn PDF document text
    • https://kenafidoragakox.weebly.com/uploads/1/3/1/8/131856022/zenutananotu.pdfIn PDF document text
    • http://glossywp.online/instructional_planning_and_teaching_strategies_mcqsi11t6.pdfIn PDF document text
    • http://doordash.link/55609358378pf7k3.pdfIn PDF document text
    • http://scandisvet.ru/slice_of_life_anime_2019v6r0f.pdfIn PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/nipemawemiw.pdfIn PDF document text
    • https://cdn.sqhk.co/dakagugi/iNRicM8/20_clues_level_6.pdfIn PDF document text
    • http://kittyplay.online/bootstrap_card_carousel_templateyig6r.pdfIn PDF document text
    • https://xowimigijik.weebly.com/uploads/1/3/1/6/131637135/3888579.pdfIn PDF document text
    • http://stavki-na-sport.site/40745285983sdufj.pdfIn PDF document text
    • http://betmoy56.com/wewokolotalapuwofusupuh6m38.pdfIn PDF document text
    • http://itasummer.fun/guninubejdohy.pdfIn PDF document text
    • http://hyipinvest.site/whatsapp_plus_ver_6._70qeud9.pdfIn PDF document text
    • http://erogancolumbia.site/the_girl_with_the_dragon_tattoo_2011_movie_cast28x59.pdfIn PDF document text
    • https://gekiwudev.weebly.com/uploads/1/3/4/7/134769606/7230845.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/pewebopufupe/96129491454.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/glaucoma_treatment_guidelines_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/credit_suisse_deutschland_ag_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/samsung_ak59_remote.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_off0000d8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E2 5392 bytes
SHA-256: cba059339db9fc837596921c1dfe0a4e3d149a40a011d1f8392c501893abb91f
font_01_sfnt_off0000eb21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB21 10104 bytes
SHA-256: f7a8a29585806cebb637a866f67f8c9e09d8940b0040a78e7b18a71f8e7de850

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