Malicious PDF — malware analysis report

Static analysis result for SHA-256 325ebe2298a842da…

MALICIOUS

PDF

74.5 KB Created: 2021-04-11 18:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c24dfe47ca9b06ba40ab8326e7b5d5f8 SHA-1: 2415cfe0fa1799285867a5265df41be9e49569fd SHA-256: 325ebe2298a842da9b42ba7cbbbe4735ccc0bbdc9aa5914653b641b0813c4d6e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one critical heuristic identifying it as a PDF link farm. The primary malicious URL, https://xezojetit.ru/strik?utm_term=viper+car+starter+installation, suggests a phishing or malware distribution lure related to 'viper car starter installation'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • 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://xezojetit.ru/strik?utm_term=viper+car+starter+installation
    • http://kopogaxepaku.sportsontheweb.net/60142113379.pdf
    • http://pumba.fun/nujevizagobisexupoludixaku19sf.pdf
    • https://cdn.sqhk.co/wemopizajazo/3Zjbhii/zombie_army_dead_war_4_ps4_review.pdf
    • http://vamefegali.mywebcommunity.org/nukesekixedekoxele.pdf
    • https://cdn.sqhk.co/xasujuteguk/ihljjif/45561970854.pdf
    • https://cdn.sqhk.co/nikazurokuv/rKzjisO/snake_blast_online_free.pdf
    • http://manybigs.space/irritrol_rain_dial_manual_not_workingyhv09.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f9c380c0-3c9a-404e-8c76-a924832b335c.filesusr.com/ugd/9c8fb9_27e8831ebcc44fdf9cea59bfe08a4fd6.pdf?index=true
    • https://7a579b3f-ce96-4c66-abdc-991530493d29.filesusr.com/ugd/010c6b_a1caf5d05a2a49a4b53259755c69febb.pdf?index=true
    • https://8dac4d01-2cd1-45d2-8b5f-6005f802adc9.filesusr.com/ugd/1f96ce_c5a8aaf11fd1419eb7709ab84bb9aa06.pdf?index=true
    • http://jasunusemoki.onlinewebshop.net/zapixapodenopezizasiwona.pdf
    • http://teropisarazo.myartsonline.com/arthritis_knee_exercises.pdf
    • https://58552d80-c20c-4e4f-99b9-91bedbcc07a3.filesusr.com/ugd/c18496_008de799ea7746ae9d1dcd928466d8c3.pdf?index=true
    • https://932aa67c-856a-4fda-9fc8-fe3f50d4acc2.filesusr.com/ugd/a25eee_b3854ca5305e4b468d0d529e9cf6b65c.pdf?index=true
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_d5b7bd47658e40bf9eb3281278e463cc.pdf?index=true
    • http://rurebafib.onlinewebshop.net/cardiac_glycosides.pdf
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_a4d5fe3d4af44a57807566eb2709bbdb.pdf?index=true
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_1a96119a4c3e4038bfd0ccd75190c47a.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_off0000e8ec.bin
83d4dd03e2279e164d3f30a4f06aa3bd2e71ad477b4bcafaf8c4d9f2cebdaec6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EC 4892 bytes
font_01_sfnt_off0000f9a2.bin
e360492ec25de34950108d5fc901b636b9d799b475de52afb644096df8224e16		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A2 10280 bytes

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