Malicious PDF — malware analysis report

Static analysis result for SHA-256 828606ab8663439a…

MALICIOUS

PDF

87.7 KB Created: 2021-03-14 09:39:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5ac3335d56b0e35c24e2eb9c100b7a4 SHA-1: 51aaf52c62f53b9dc9a2e63941adb7e0eba57ec8 SHA-256: 828606ab8663439a98fc56b68ce1f36d14191339ca475f3ad24af7b16376978a
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific ClamAV detection name of Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0. An external URI pointing to 'https://bologen.ru/wix?keyword=mxl+4000+mod' was extracted, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a date, indicating it might be a crafted document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wix?keyword=mxl+4000+mod
    • https://menanotiji.weebly.com/uploads/1/3/4/3/134322389/bixem.pdf
    • http://sayseedokg.com/free_online_multiplayer_survival_games_pc7nfzn.pdf
    • http://zeropium.com/kobukisevulorudimipetgxhae.pdf
    • https://cdn.sqhk.co/xojoreve/haieFhb/airport_control_tower_salary.pdf
    • http://tibetterrier.ru/how_to_lubricate_dremel_flex_shaftodxf9.pdf
    • http://spoonnumberone.xyz/3550108383b5b8m.pdf
    • http://9gusevshop.website/best_shooters_nba_2019_draftjzv4e.pdf
    • http://oneshops.space/mary_poppins_returns_reviews_christiandn9n5.pdf
    • https://cdn.sqhk.co/fopeziriga/5D8eeoG/terraforming_mars_beginner_strategy.pdf
    • http://gooddevice-online.com/17248212204er461.pdf
    • http://korecos.ru/ukulele_chords_songs3fcjf.pdf
    • https://gugagefa.weebly.com/uploads/1/3/4/3/134343265/8513843.pdf
    • http://fortuneo-enligne.com/940515469529tx9b.pdf
    • https://zinorenote.weebly.com/uploads/1/3/5/3/135349773/803745.pdf
    • https://muxupodijem.weebly.com/uploads/1/3/4/8/134885552/zixofakef-rotevibu.pdf
    • http://smartcreditscore.info/nefoxedaloboliwowwsw8.pdf
    • https://gelasinez.weebly.com/uploads/1/3/4/7/134763890/sowejokatuwoka_tijaxugon.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://26577e91-18e8-42c3-8e85-49dcca1d6605.filesusr.com/ugd/195787_8de27506667747cb9999628b754523af.pdf?index=true
    • https://uploads.strikinglycdn.com/files/52fab136-5b10-497b-8ef3-f4f0c0c11256/casio_g_shock_5255_ga_150mf.pdf
    • https://uploads.strikinglycdn.com/files/4aa2aa42-cd03-47d4-907a-c7fc195b7e5c/91183015706.pdf
    • https://46c19374-600d-43be-a5f2-d8bf07c6fddf.filesusr.com/ugd/cc94a4_863c1a86f220415a9cba1a6cfe04b8e7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/037f781b-9fdf-4403-955b-d5355ce41e93/10187522871.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011804.bin
dfcec00f658884dc0863cf6410d368de137f34514340c08eb4a8741301eddf11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11804 4792 bytes
font_01_sfnt_off00012858.bin
7482549507e55c86b92ff3daf097c8c7a5aa1d038d8615950813576c5968aafe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12858 12176 bytes

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