Malicious PDF — malware analysis report

Static analysis result for SHA-256 3db389463d46f25b…

MALICIOUS

PDF

86.5 KB Created: 2021-04-08 05:29:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ca3167b74f489d6db008cbaa5eeb8cf2 SHA-1: 7a5ffef3edffb7d0e2469e28db0a8b0221d29d33 SHA-256: 3db389463d46f25b1b2b4a84a9194210c5925f3e1a24a2ac7163c691ed226d7a
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 potentially malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://pelibifir.ru/strik?utm_term=in+god+alone+hymn+lyrics PDF link annotation
    • https://cdn.sqhk.co/derebeduno/tiXqhiU/super_bomberman_r_switch.pdfIn PDF document text
    • http://cybety.xyz/bedinowimujitexopamivkw6be.pdfIn PDF document text
    • http://bepelisufozasep.mywebcommunity.org/calendar_2020_malayala_manorama.pdfIn PDF document text
    • http://reweder.site/kelunodupprzge.pdfIn PDF document text
    • http://usejus.club/95649077866q8ppc.pdfIn PDF document text
    • https://cdn.sqhk.co/rorazelesu/aicmPih/viwunifinirotos.pdfIn PDF document text
    • http://ru-1.casa/pufimomaxigurivufidebija3pela.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/7dTGhjC/heart_emoji_facebook_code.pdfIn PDF document text
    • http://mmmmmme.space/carrom_pool_hack_filen08xd.pdfIn PDF document text
    • http://pazefezos.mywebcommunity.org/public_relations_specialist_definition.pdfIn PDF document text
    • http://favuloxodi.iblogger.org/hp_laserjet_professional_m1212nf_mfp_not_printing.pdfIn PDF document text
    • http://afracheat6.xyz/joboxanurusog8p0x.pdfIn PDF document text
    • http://bekokax.getenjoyment.net/89211709232.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/hgJieEt/4796504310.pdfIn PDF document text
    • http://form-copyrightservices.com/nj_transit_bus_164_holiday_schedule_163avzin.pdfIn PDF document text
    • http://uose.xyz/asmaul_husna_dan_artinyaorqzx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://aca56392-15ae-48e8-982c-fdf6c4ac0dc3.filesusr.com/ugd/00c070_c1f74ff3d7294c589a90e19b228515b4.pdf?index=trueIn PDF document text
    • https://5057b38b-f250-4925-a5fd-2dbc054a2c1f.filesusr.com/ugd/25ee37_61895de5366a41bf9fd45e4c8e955e78.pdf?index=trueIn PDF document text
    • http://fepoxojosatomu.epizy.com/tejowakapolusadukiw.pdfIn PDF document text
    • http://dogufisojorosef.epizy.com/barbie_doll_games_app.pdfIn PDF document text
    • https://79d8ee67-2172-45f8-9737-086b37aa5bdf.filesusr.com/ugd/2ab2ae_115c588747254648816f5bb8d35799b9.pdf?index=trueIn PDF document text
    • https://5a11eff3-0c7a-45dd-bb89-060d4d4d2060.filesusr.com/ugd/72216b_a5d3ff351967429c8633f400e8aae717.pdf?index=trueIn PDF document text
    • https://cb0920a4-0dfc-4587-8161-bd3bf883b043.filesusr.com/ugd/df391a_783e575e39eb43af957d9d40a5c593e7.pdf?index=trueIn PDF document text
    • http://menowawonip.rf.gd/17915284150.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE7 5392 bytes
SHA-256: 5f300285ed3044d7f8ec8ca64ce02064622749c00733d815b683ab32af6f5aa4
font_01_sfnt_off0000fe0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0F 4564 bytes
SHA-256: 3c1e10d2a449d65f16dbc6504515718aafe2b917d76683da61b54361652c0700
font_02_sfnt_off00010f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4A 11756 bytes
SHA-256: f1c344c9fbc7677e09cc5740e29a0ee0f884e9777ba8552ebd1ac8b989354cdd
font_03_sfnt_off00013762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13762 16036 bytes
SHA-256: 149cab45689013e99d1aa520d2e5234663aa5d8577b6aae5e423b5d60aeda4c1