Malicious PDF — malware analysis report

Static analysis result for SHA-256 86f1bd62b004eb9e…

MALICIOUS

PDF

62.2 KB Created: 2020-12-10 01:41:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a35cc6634ecf1cb94c77dda3a2c2d75d SHA-1: bb940f16db4e5f8eca8c5d0dcdb9f3693a7b4809 SHA-256: 86f1bd62b004eb9eaa5d09a0cb2e6ee7ac16f91c7003c90c6caa23fce30230dc
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution T1071.001 Web Protocols

This PDF file exhibits characteristics of a phishing lure, specifically designed to harvest credentials by impersonating a gift card balance check. The presence of a large number of external links, many hosted on disposable domains, suggests a link farm intended to distribute malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to credential harvesting or MFA bypass.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://trafffi.ru/strik?utm_term=check+my+ll+bean+gift+card+balance PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4503390/normal_5fb9bba30e7d3.pdfIn PDF document text
    • https://jinonapipi.weebly.com/uploads/1/3/4/4/134481743/2675513.pdfIn PDF document text
    • https://guxolufesa.weebly.com/uploads/1/3/4/4/134468064/6392740.pdfIn PDF document text
    • https://rikurifijuse.weebly.com/uploads/1/3/4/6/134681474/rezovovob.pdfIn PDF document text
    • https://punizino.weebly.com/uploads/1/3/4/3/134327780/4014517.pdfIn PDF document text
    • https://jujapuboma.weebly.com/uploads/1/3/4/6/134688254/jamuz-surajamopofib.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/gelawiweza/beauty_plus_me_app_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e6384a6-008b-4db3-bb85-c113007754da/indksiyon_ocaklar_dkm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d8a0da2-c1f2-44aa-849d-13f5634614d8/mario_maker_3ds_rom_cia.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/fau_basketball_team_record.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/695081fe-9557-4c27-a4da-4225326f549e/97586356862.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/zafuzimezozona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b14e37c-953f-4887-b8de-371facc4373d/vavotomegaxenab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/341de5ee-3ebb-4479-864f-3a3df8f6be72/jurassic_world_evolution_dinosaur_co.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_off0000b5ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5FF 5468 bytes
SHA-256: 0ede96798caee4c7a68a850510c14ef778f624c9e16247c07788deb308ae14a5
font_01_sfnt_off0000c874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC874 10444 bytes
SHA-256: 2aaa767158ea17fd94aafb7a0922cd95583d5cdc93fd651cbcd794e7d0cd7492

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