Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5079c99357d5893…

MALICIOUS

PDF

77.3 KB Created: 2021-03-03 22:34:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0f00021429af10d67e030d2b8f4d852 SHA-1: aed2e46a3be498847955093b7e5421d40426dabe SHA-256: f5079c99357d5893add4be6571d1d5b29830c45f1c9bb85932c7e4f6765be867
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, with a high risk score. It contains an embedded URI pointing to 'nipisod.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests an attempt to impersonate literary content to mask malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/aws?utm_term=william+faulkner+as+i+lay+dying
    • https://cdn.sqhk.co/lizuxutagisu/idijjfZ/42686746362.pdf
    • https://cdn.sqhk.co/waxobakal/ficjjge/xawixinovimemazodimuredat.pdf
    • https://cdn.sqhk.co/dexasubu/hcI6qjh/33270626719.pdf
    • https://cdn-cms.f-static.net/uploads/4426830/normal_6026e44f32863.pdf
    • https://static.s123-cdn-static.com/uploads/4379038/normal_5ffd817dba873.pdf
    • http://tosefabebiribow.scienceontheweb.net/nidafamotoxewunanipuwi.pdf
    • https://cdn.sqhk.co/senuziker/dhhi3dC/music_player_equalizer_audio_mp3_player_band.pdf
    • https://static.s123-cdn-static.com/uploads/4376612/normal_6003f8a467aa5.pdf
    • https://cdn-cms.f-static.net/uploads/4379602/normal_602f0effb8526.pdf
    • http://xojuxegalixiluj.66ghz.com/93841053818.pdf
    • https://cdn-cms.f-static.net/uploads/4458837/normal_60174ca4bf877.pdf
    • http://sabovibin.medianewsonline.com/kujevewar.pdf
    • https://cdn-cms.f-static.net/uploads/4374698/normal_603de76e4892a.pdf
    • http://bogipeborowe.sportsontheweb.net/how_to_get_log_bed_animal_crossing.pdf
    • https://cdn.sqhk.co/noviraxat/jjibkgj/thalapathi_movie_song_ringtone_free_download.pdf
    • https://cdn.sqhk.co/sozovifena/pghbgiM/21381095914.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://kodexogezetegir.epizy.com/hang_seng_insurance_annual_report.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e379.bin
74044e1ad76043d1ef546be6a50249d7136392b1a0f7258f9fd14011d71ed439
pdf-font-stream PDF embedded font (sfnt) at offset 0xE379 5096 bytes
font_01_sfnt_off0000f4be.bin
b6a27e5b7582d8d1cbc04e1362e35069543868661a297502ff43934895e1bf64
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BE 10964 bytes
font_02_sfnt_off000119f3.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x119F3 4324 bytes