Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8a75fe9a8cf2e6a…

MALICIOUS

PDF

69.8 KB Created: 2021-03-22 06:50:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb7101b601bed45ecb5a761fd3f5334c SHA-1: 98664e38fcd786ef4477a2c63d63e9ab5e2393e7 SHA-256: a8a75fe9a8cf2e6a01656afc20c10d1a2e7b3550e30aaf5e83cef5bffd84de56
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, vilenefex.ru, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a malicious site, potentially leading to further compromise.

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/award?keyword=liggghts+tutorial+pdf
    • http://kuvelopomegemes.iblogger.org/how_much_is_my_barbie_doll_collection_worth.pdf
    • http://rowexusaje.mypressonline.com/abbyy_to_word_converter_online.pdf
    • http://wozuxel.getenjoyment.net/modevoxu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gudukupir/bose_remote_control_tv_setup.pdf
    • https://uploads.strikinglycdn.com/files/6e048315-7a78-4de1-a329-72be056b1e53/little_fires_everywhere_synopsis_episode_8.pdf
    • https://uploads.strikinglycdn.com/files/93eec6fb-3f86-42b6-8e79-84b5dd07e923/xerox_workcentre_3325_toner_amazon.pdf
    • https://uploads.strikinglycdn.com/files/a4669c1e-ff9b-4085-964a-af86b5fd0098/72982368508.pdf
    • https://s3.amazonaws.com/pukiza/bajunararunaromowujatibim.pdf
    • https://uploads.strikinglycdn.com/files/57e7553b-f812-47e5-9645-5badedc6448d/xevetazanapidurifefo.pdf
    • https://s3.amazonaws.com/janodojivi/ycmou_ba_admission_form.pdf
    • https://s3.amazonaws.com/donarepemi/autograph_tamil_movie_full_hd.pdf
    • http://bevavotubuzepu.rf.gd/boult_tru5ive_manual.pdf
    • https://s3.amazonaws.com/pezofut/the_believer_s_authority_study_guide.pdf
    • https://uploads.strikinglycdn.com/files/de9e9ef0-2cfd-4e47-a026-95266c295530/what_does_visually_aesthetic_mean.pdf
    • https://s3.amazonaws.com/janodojivi/somewhere_over_the_rainbow_ukulele_tabs_strum_pattern.pdf
    • https://uploads.strikinglycdn.com/files/35273304-6946-4cea-971f-fd3c8e4753db/taylor_digital_bathroom_scale_bamboo_review.pdf
    • http://rituruve.epizy.com/fikemozilobopitupi.pdf
    • https://uploads.strikinglycdn.com/files/6211d347-081c-4251-9e39-d572aa391bc4/stihl_gas_trimmer_line_replacement.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_off0000d176.bin
8b15e2b552c50da95ebac9261cc5524b22ad320b7e52b4920ea9030725da808d
pdf-font-stream PDF embedded font (sfnt) at offset 0xD176 5244 bytes
font_01_sfnt_off0000e34d.bin
d5de6a25b9f103d5ebd8ad7cb930c9161f68b2e694871865c2693fff2037b19d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE34D 11056 bytes