Malicious PDF — malware analysis report

Static analysis result for SHA-256 9901e375277e9c76…

MALICIOUS

PDF

73.6 KB Created: 2021-02-28 10:50:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 66ed780ee855e64e680c3d843bd612e1 SHA-1: dde250b66ec8de21818ff547ac797821b5e7ae7e SHA-256: 9901e375277e9c76be166e7ef4ca8ca0b7909ca9086de74bcf57230f5c070686
166 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a payment redirection lure, a common tactic in business email compromise attacks. It also includes numerous external URIs, one of which is hosted on disposable infrastructure, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the presence of PDF_URI and SE_PAYMENT_REDIRECT_LURE heuristics strongly suggests malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://lozipotod.ru/award?keyword=how+to+set+up+plantronics+headset PDF link annotation
    • http://organic100.fun/julius_caesar_movie_2002_watch_onlinel19qm.pdfIn PDF document text
    • http://mitefakosutupot.22web.org/gimomo.pdfIn PDF document text
    • http://tehnotop.store/berosubogaxoripigegi5d915.pdfIn PDF document text
    • http://finonit.mypressonline.com/taparekeboxi.pdfIn PDF document text
    • http://bloodcraft.online/transport_coordinator_job_interview_questions_and_answersc58fk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452835/normal_602b668d5868b.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/86500993547.pdfIn PDF document text
    • http://jogedisilokazex.iblogger.org/52327582699.pdfIn PDF document text
    • http://andyhongdigital.com/calculus_1_limits_problems_and_solutionsf8wt9.pdfIn PDF document text
    • https://cdn.sqhk.co/fetebutujo/uIugdhh/preschool_lesson_plan_ideas_for_september.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zubiluwetij.myartsonline.com/is_there_a_free_version_of_ms_access.pdfIn PDF document text
    • http://xavavumima.rf.gd/wabesiroluliruneru.pdfIn PDF document text
    • http://goxoloxegaw.epizy.com/speed_seduction_free.pdfIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/how_to_setup_xerox_workcentre_6515_scan_to_email.pdfIn PDF document text
    • http://zubiluwetij.myartsonline.com/13039151429.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_off0000e443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE443 5212 bytes
SHA-256: 1a6da48ae941b75f5ea54fbc71a6f35c0a263eedb92e3f59962d200387084902
font_01_sfnt_off0000f601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF601 10412 bytes
SHA-256: 6a1595831bbb7714f3181782a8adb86672e0b0b91ee3ae3328b40c1a9b6479a8

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