Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce47125a41beea80…

MALICIOUS

PDF

79.6 KB Created: 2021-04-05 00:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d2d98806c9a5ffb0885d41e1f747fc8c SHA-1: 98091b3c883fc978a4bb9aba1c2d7adcf284a6e8 SHA-256: ce47125a41beea80888782063b1e4170f1933143ada3823b00fab5ae2a2ed26e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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
  • 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.
  • 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://golowaki.ru/123?utm_term=bushy+park+map+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367279/normal_605af79f3b64b.pdfIn PDF document text
    • https://rajuwirorevub.weebly.com/uploads/1/3/5/3/135306937/793be6.pdfIn PDF document text
    • https://varozuwibudod.weebly.com/uploads/1/3/4/3/134327914/3055837.pdfIn PDF document text
    • https://cdn.sqhk.co/gobenebovi/csljiM3/new_mini_mastercraft_2020_uptodown.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470985/normal_5fcb578350359.pdfIn PDF document text
    • https://cdn.sqhk.co/loberutebe/d9OGlUC/word_trip_level_490.pdfIn PDF document text
    • https://wuzitefagoxu.weebly.com/uploads/1/3/1/8/131856046/975ba64cbbf73.pdfIn PDF document text
    • http://fukebomodipaz.22web.org/tuxalo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374521/normal_60686e65826af.pdfIn PDF document text
    • http://excellent-spb.ru/separation_techniques_chemistry3431v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471467/normal_6037b6c3ca93d.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/Ghcbwij/30704475791.pdfIn PDF document text
    • http://amaryllis.space/60978451468mi96c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445114/normal_605f4a1eeb749.pdfIn PDF document text
    • http://infonewstravel.com/how_to_fix_portable_dvd_playera184r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410418/normal_60369edf983aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473640/normal_6021bdbc3dbf7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jilawovo.epizy.com/lenovo_t420_battery_plugged_in_not_charging.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_off0000f976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF976 5464 bytes
SHA-256: 07a1a9913078cb043e03e7edc6c00da6729802c98a08842528fd832121f65d60
font_01_sfnt_off00010beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BEB 11132 bytes
SHA-256: 5cf1ee1b692a49db49e9dac9ef1a7c787133dcfd00af1efe5d3bb2d39a8de11e

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