Malicious PDF — malware analysis report

Static analysis result for SHA-256 6982d55332f9b41f…

MALICIOUS

PDF

73.3 KB Created: 2021-03-20 13:52:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93f15b7b9fbf801f32113fea07236d26 SHA-1: 64a21173388d59d7d5d3e4a8908101aab854514a SHA-256: 6982d55332f9b41f0dac24dd85e3ac2adc33601ccd5fb49e9ad701a41c97a42e
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'vilenefex.ru', which is likely a phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, consistent with phishing or malware distribution.

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/strik?utm_term=dyson+dc18+post+motor+filter+removal
    • http://wordsideget.top/445195885409w0ai.pdf
    • http://mazipuvaxa.mywebcommunity.org/guia_ceneval_administracion_resuelta.pdf
    • http://bet-info.ru/list_of_magic_tree_house_books_in_number_orderogt0e.pdf
    • http://tijudiwulewanuw.getenjoyment.net/buruvudamesaf.pdf
    • http://mihetos.xyz/what_health_and_safety_training_is_requiredsui1m.pdf
    • http://muzhskoizhurnal.ru/star_trek_movie_2009_songsn7d01.pdf
    • http://rbqjkwklnd.xyz/scott_scale_large_frame_sizeegrrg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/379077bf-9742-4ad8-88f5-27a0f7589bd1/ruger_lcp_2_problems.pdf
    • https://s3.amazonaws.com/fotojipifuzitul/chhota_bheem_full_movies_free.pdf
    • https://uploads.strikinglycdn.com/files/cecd783c-39e2-4508-b097-90aeab5bdfba/pema_chodron_guided_meditation_audio.pdf
    • https://s3.amazonaws.com/jazuravazaguz/23432244850.pdf
    • http://mikijanux.atwebpages.com/41911820613.pdf
    • https://uploads.strikinglycdn.com/files/8a3fe1a9-5cb5-44ae-8a4c-9c10c688a442/60674664334.pdf
    • https://uploads.strikinglycdn.com/files/c35f3ec8-d303-4442-a9b5-f78301222f5b/2018_scott_scale_710_specs.pdf
    • https://s3.amazonaws.com/bejokazemur/12353071142.pdf
    • https://s3.amazonaws.com/jadere/75414806847.pdf
    • https://uploads.strikinglycdn.com/files/3a1d1f72-da8f-4af6-8560-10162e9e940b/shattered_sky_shader_location.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_off0000df03.bin
605d11e824c919bdd66f52517c9bf1b2f9ba5c0d53c8332715f1eddcf235e857
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF03 5708 bytes
font_01_sfnt_off0000f276.bin
e643a7f8cb42de1dbf4527b9d9f993bfcaa6fab2000308e61c1a95f473477ea0
pdf-font-stream PDF embedded font (sfnt) at offset 0xF276 10516 bytes