Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5fbf68a139b5d94…

MALICIOUS

PDF

81.4 KB Created: 2021-03-03 10:43:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 40f98e5f65b44585b954c701a6f9b463 SHA-1: 8ee2f25237d79bb56cc99e739245bcd7866c3a39 SHA-256: e5fbf68a139b5d94af695acba250deb20be29412fe38172452f1ce1cbf166906
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution lure. It contains numerous embedded URLs, including invisible links pointing to suspicious domains like 'kuzutuzo.ru' and 'com-login8.xyz', suggesting an attempt to redirect users to malicious content. The presence of link farm heuristics further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=shark+steam+cleaner+repair+parts PDF link annotation
    • http://custits.space/ed_and_ing_adjectives_worksheetrk0qy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415739/normal_6019ac9a6d332.pdfIn PDF document text
    • http://torixewiser.medianewsonline.com/cobra_walkie_talkie_battery_charger.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475196/normal_5fd96f687103d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487894/normal_5ffab7cbe9c28.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/xawukenobakusopazikepun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369165/normal_6018e5e726f98.pdfIn PDF document text
    • https://cdn.sqhk.co/laruxibut/gjabibe/lamivuje.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407316/normal_6004b384acfe6.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/the_lemon_orchard_line_by_line_analysis.pdfIn PDF document text
    • http://com-login8.xyz/parrot_mki9200_remote_does_not_workg2o2f.pdfIn PDF document text
    • http://smartcoin.design/what_time_is_stock_market21wwk.pdfIn PDF document text
    • http://3gusevshop.space/battlegrounds_full_crack9co0j.pdfIn PDF document text
    • https://rakiletapaleta.weebly.com/uploads/1/3/1/8/131856645/jesidevoruf.pdfIn PDF document text
    • http://microdigitalmeter.xyz/mofudumipabinugeo9qei.pdfIn PDF document text
    • https://cdn.sqhk.co/zamokaxu/bkuaImN/gs-_iii_heroes_of_the_mig_alley.pdfIn PDF document text
    • https://nubeboganiroj.weebly.com/uploads/1/3/1/3/131384383/kewozami-wekuzolaropax-pegizevizobuv-mofujake.pdfIn PDF document text
    • https://cdn.sqhk.co/rekewuneboxu/gdjeLTz/gitopefipilobidozivim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zufisad.rf.gd/titisolubetepasimusupow.pdfIn PDF document text
    • http://wuwuxatedi.epizy.com/lorazijogufidixuvuxunokos.pdfIn PDF document text
    • http://zoloxufiz.epizy.com/lifebujobovonowatopenej.pdfIn PDF document text
    • http://xukokumo.myartsonline.com/89534461190.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_off0000feeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEB 5340 bytes
SHA-256: 929b60f91246594ef1cd905426a07e081627e8c34636f61c5256ab8229a5b228
font_01_sfnt_off000110ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EA 11748 bytes
SHA-256: 99b732c85c2a95005dde26a1a5e79d2d5dfe18ac89303c2131c7ec3524646327

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