Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f82e204abf979a…

MALICIOUS

PDF

80.4 KB Created: 2021-04-25 07:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a4adaa5602ccbd4efc3e6e113cd8600f SHA-1: 37a6826eef7c98b76b1d3eb952e16e9818c11488 SHA-256: f0f82e204abf979a6a016ddb17e2d3f4735cbd7cbe2d7057a1b4ed6f5ec009b1
166 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 0.9993

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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=cabrio+washer+drain+problems PDF link annotation
    • http://matroskin.space/52907376540tewb5.pdfIn PDF document text
    • http://e-devletodeme.net/woxubisalogewetidokrey9h.pdfIn PDF document text
    • http://zebrait.fun/28014818086ke7eh.pdfIn PDF document text
    • https://cdn.sqhk.co/tudusiki/Ghhphgv/zepumulamunokinila.pdfIn PDF document text
    • https://cdn.sqhk.co/wikaraxixi/hfihghk/fimovav.pdfIn PDF document text
    • http://theandyhong.com/hydraulic_jump_calculations_excelcy9mx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481667/normal_6016944667f0b.pdfIn PDF document text
    • http://copalofa.site/71246832500eziem.pdfIn PDF document text
    • https://cdn.sqhk.co/rubovadu/gjhl4To/home_switchboard_price.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501503/normal_601224e23100b.pdfIn PDF document text
    • https://cdn.sqhk.co/gegatuzikat/jhdjajf/40641209084.pdfIn PDF document text
    • http://shopwithsale.website/210139036596d6mz.pdfIn PDF document text
    • http://leaninrzpd.site/breadman_plus_tr600_paddlezmqla.pdfIn PDF document text
    • http://securityofusersdevicesonline.site/new_york_times_acrostic_answersh1net.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478968/normal_605afba879013.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488555/normal_5fd79bf592175.pdfIn PDF document text
    • http://bet-info.ru/how_to_clean_bose_companion_5_control_poduco6i.pdfIn PDF document text
    • http://silver35.ru/edenpure_gen_2_not_heatingrof9m.pdfIn PDF document text
    • http://prizinsta365.website/30398772436fyoi0.pdfIn PDF document text
    • https://cdn.sqhk.co/dogilijesiwu/hiLCiPJ/pixies_crafty_workshop.pdfIn PDF document text
    • http://reliables.ru/chamberlain_whisper_drive_plus_wont_opencau1o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_4c93c5e5c3b24da486f0d9c8a89031a3.pdf?index=trueIn PDF document text
    • https://e055bcc9-c4f1-4c6c-8dcb-0912bf54750f.filesusr.com/ugd/b4a829_360486774e4246a3ba904fb75a6233ef.pdf?index=trueIn PDF document text
    • https://ee897e78-a157-4eb5-8a47-d615096087a2.filesusr.com/ugd/113e89_d749de6522904544882931651c61924e.pdf?index=trueIn 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_off0000fb9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9B 5336 bytes
SHA-256: 1d7a8e54cf19b4048cddc2e0685aad336de8791ebb705d332a07a6b88f0c6fe3
font_01_sfnt_off00010d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D97 10888 bytes
SHA-256: 497a07078c9e54619001bfe1621153ea576e2b454c1b6c0d62619e7470ca42de

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