Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2cbc1f6b73000d…

MALICIOUS

PDF

68.9 KB Created: 2021-03-31 22:25:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 75a64a0297002c777369a11f31453867 SHA-1: afaec8e23ee3a0d74e9ac20c239ddd78244e4790 SHA-256: ce2cbc1f6b73000dc68f0ec0d707506211a23902dde3da2b49725d358730360c
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'Guardian quick crossword answers'. No scripts were extracted, but the heuristic firings and URL analysis point to a malicious PDF designed to redirect users to potentially harmful sites.

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://xezojetit.ru/123?utm_term=guardian+quick+crossword+answers+15429 PDF link annotation
    • http://bagerisevi.scienceontheweb.net/the_rules_book_texting.pdfIn PDF document text
    • http://saluzoz.iblogger.org/how_to_draw_easy_stuff_on_procreate.pdfIn PDF document text
    • http://lazakefezives.mygamesonline.org/angielski_wiczenia_czasy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419002/normal_6007d791112e8.pdfIn PDF document text
    • http://bekopomulasebi.getenjoyment.net/2004_dodge_dakota_repair_manual_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486535/normal_604036066d2f2.pdfIn PDF document text
    • https://cdn.sqhk.co/gimexigerub/OrgcCha/pilot_mountain_camping_sites.pdfIn PDF document text
    • https://cdn.sqhk.co/wawerugile/hjhjBBk/survival_manual_app.pdfIn PDF document text
    • http://novoruxove.iblogger.org/66149882354.pdfIn PDF document text
    • http://topukovatawosu.sportsontheweb.net/holistic_marketing_orientation_model.pdfIn PDF document text
    • https://cdn.sqhk.co/rebabafa/azdSiig/homeschool_daily_schedule_kindergarten.pdfIn PDF document text
    • https://cdn.sqhk.co/lelabepena/gfjb2g1/hockey_fight_gif_funny.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489732/normal_600a7f4e9ebba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vizebafep.epizy.com/chemistry_molar_conversions_worksheet.pdfIn PDF document text
    • http://gifilipajodibax.rf.gd/isometric_and_orthographic_drawing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30b8b27f-b34a-4535-a45b-540bdec53466/tavug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14ad7127-dfc6-4089-8a90-56ee024e1be6/54457353594.pdfIn PDF document text
    • http://xejawaji.myartsonline.com/gopafagitaxare.pdfIn PDF document text
    • http://vebavibokifoko.epizy.com/annamalai_song_free_starmusiq.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_off0000cde8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE8 5764 bytes
SHA-256: 96804f97b7070bdbe640ae95703faf8267798cae20327954b56cbc457233b63b
font_01_sfnt_off0000e1bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BB 10232 bytes
SHA-256: d0d0a4c626f7ffaec43954483e2ada9cce6f23b42785e28e7ddf158c6f916d61

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