Malicious PDF — malware analysis report

Static analysis result for SHA-256 393cc7188548777a…

MALICIOUS

PDF

73.6 KB Created: 2021-04-01 19:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3b4ede1be2821c4165a15c488e3d399 SHA-1: c878e071ba46ab4fb8b336280a3b834e611a8a1a SHA-256: 393cc7188548777ad48f24b9ea7bc95eaa58f0336b0842980935cb07d3015f09
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, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, vilenefex.ru, which is likely used to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to a soundbar manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/aws?utm_term=barra+de+sonido+rca+rts7010b+manual
    • http://lojapidabud.mypressonline.com/adverse_event_adalah.pdf
    • https://static.s123-cdn-static.com/uploads/4486982/normal_5fe56ce3bb3c1.pdf
    • http://dabosesavedevet.medianewsonline.com/lubojegorojukesukedi.pdf
    • https://cdn-cms.f-static.net/uploads/4380083/normal_601391ed52506.pdf
    • http://firobazotu.sportsontheweb.net/brideshead_revisited_free.pdf
    • https://cdn-cms.f-static.net/uploads/4408879/normal_6021001dcd489.pdf
    • https://cdn-cms.f-static.net/uploads/4453326/normal_60485f8bc374c.pdf
    • http://digosige.mywebcommunity.org/exceptional_c_free.pdf
    • http://gijaninapumobe.sportsontheweb.net/6052085339.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://satogitexuvo.myartsonline.com/world_map_continents.pdf
    • https://146c8b6c-0b46-450b-8ed0-b45f1e2a4974.filesusr.com/ugd/b58d21_dd789a864ffb4a60af923a0c8dedef8d.pdf?index=true
    • https://54a0e2cb-796f-4f80-9aaf-d11633176b06.filesusr.com/ugd/b0c554_394cf8cac4c24505be07e901310c1b26.pdf?index=true
    • http://sovogezo.atwebpages.com/17727405993.pdf
    • http://mojigoka.atwebpages.com/1009186475.pdf
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_a85f681f16c949f78c8be11bdaaf3888.pdf?index=true
    • http://juroluse.rf.gd/abbi_glines_until_friday_night_espaol.pdf
    • http://segefebeb.epizy.com/legaxu.pdf
    • https://7e005a1c-fb68-43c1-af83-b854b6a2d282.filesusr.com/ugd/dcfb95_5496b2064118442b926d59accb53fb28.pdf?index=true
    • 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_off0000e23e.bin
39185d5a2aafc8e085d50e8d1d0dd4d2d4b675f25a07fd25332bc119abbb527f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE23E 5548 bytes
font_01_sfnt_off0000f507.bin
d98f5cd1c99a902e9e701adec10a039053dd54f56108906652e1f360448dcf32
pdf-font-stream PDF embedded font (sfnt) at offset 0xF507 10620 bytes