Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a6ada46a2acb4b9…

MALICIOUS

PDF

67.8 KB Created: 2021-03-26 07:30:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78feaac4f1aa1b8957e933781385ad11 SHA-1: 25d5a50d8e6abcdd0f8125d40e6e1525fba72add SHA-256: 9a6ada46a2acb4b91d29792265aa95c30ed8b786f45109d9c675ec9e0004f233
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 high risk score. It contains an embedded URI pointing to a suspicious domain, vilenefex.ru, which is likely used for phishing or to download a second-stage payload. The document body, though heavily obfuscated, suggests a lure related to 'resume jobs login'. No scripts were extracted, but the PDF structure and embedded URI indicate 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://vilenefex.ru/wix?keyword=resume+jobs+login
    • http://grenkasalo4.xyz/kiwalasisimowid8uyu.pdf
    • http://xekuluw.iblogger.org/97936599440.pdf
    • https://static.s123-cdn-static.com/uploads/4416928/normal_60049333dff80.pdf
    • http://vovality.club/88654884306bqh6k.pdf
    • https://cdn-cms.f-static.net/uploads/4418781/normal_5fdbc82be27e0.pdf
    • http://tersq.space/86087231129v1qjs.pdf
    • http://naturagrush.space/chapter_5_vocabulary_practice_economics_crossword_answerslmxs1.pdf
    • http://xufotegebiv.22web.org/what_food_can_you_eat_on_candida_diet.pdf
    • http://openlait.pro/samuel_beckett_bridge_designo390x.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/16e92862-dcf0-4adc-b93b-372bb72c8d51/84785532715.pdf
    • https://uploads.strikinglycdn.com/files/a020458e-25b1-45e9-bee7-d9c02523abf4/how_many_years_is_1096_days.pdf
    • https://uploads.strikinglycdn.com/files/fb32cc50-1cc3-43e3-86df-63682d1736db/psych_characters_myers_briggs.pdf
    • http://kanoduluzoxa.epizy.com/vepakubovowogivozunubafa.pdf
    • http://magetasejo.epizy.com/panasonic_tc-p50st50_manual.pdf
    • http://fiwarirekagugen.epizy.com/55472549942.pdf
    • http://xofivijisaja.rf.gd/maquina_de_coser_brother_vx_1120_manual.pdf
    • https://uploads.strikinglycdn.com/files/0ea2ee54-366d-412b-bac5-a97b9c5a187c/80373861950.pdf
    • http://zopomotur.epizy.com/jaquar_sanitary_fittings_catalogue.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_off0000c234.bin
aa96793908042aa70ef25a2f7562b08cd2b696847940db8d65ae2e776df858f9
pdf-font-stream PDF embedded font (sfnt) at offset 0xC234 4724 bytes
font_01_sfnt_off0000d231.bin
a04c141fdc89fabf31f700b7d8ef994b7f7ce91df665ee0412633b2467172c20
pdf-font-stream PDF embedded font (sfnt) at offset 0xD231 10032 bytes
font_02_sfnt_off0000f439.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF439 4324 bytes