Malicious PDF — malware analysis report

Static analysis result for SHA-256 c356ef22e2cdc92a…

MALICIOUS

PDF

80.0 KB Created: 2021-03-04 14:34:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 0cfdfa30567626b30bb8b854a5ce9357 SHA-1: de19e99187da1894aba296db37f36bf0b52ffd6d SHA-256: c356ef22e2cdc92a47053b26c799ae0ad027f5074d923f83747d3327b19d26be
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary external URI pointing to 'https://xajibur.ru/award?keyword=taurus+pt111+g2+9mm+accessories', suggesting a lure to a malicious site. The document's structure and the presence of many links indicate it functions as a link farm, likely to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/award?keyword=taurus+pt111+g2+9mm+accessories PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370064/normal_5ff4a5e7dd7ae.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvaratuji/ic27hbN/drawer_slide_bracket_menards.pdfIn PDF document text
    • https://cdn.sqhk.co/torazanopuni/53NLmgh/linear_momentum_questions_and_answers.pdfIn PDF document text
    • http://sibatike.getenjoyment.net/xozozu.pdfIn PDF document text
    • http://wumewil.sportsontheweb.net/most_famous_english_short_stories.pdfIn PDF document text
    • https://cdn.sqhk.co/fikubife/BlWShbO/54117121606.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/heTjcUR/survivalcraft_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mirofifuba/hcgjeib/mabinanuzap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451047/normal_60215d45eec35.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://taxupot.rf.gd/most_important_full_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3acb31d-92fc-4b12-a48e-295ddef33e44/shark_navigator_vacuum_hose_repair.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/64027896158.pdfIn PDF document text
    • http://vanomuwoz.epizy.com/toxicity_testing_methods.pdfIn PDF document text
    • http://furugavasipif.epizy.com/optifine_mail_checker.pdfIn PDF document text
    • http://ferurexage.epizy.com/odia_album_song_2018_free.pdfIn PDF document text
    • http://welididoseburiv.epizy.com/ableton_free_full_version_crack_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/tomagagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52027c67-13d3-4cdf-ae6e-3cebca38d7b4/vivofit_jr_app_not_syncing.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/colliers_houston_office_market_report.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/ultrasound_guided_axillary_brachial_plexus_block.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/deranged_physiology_ventilation_waveforms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22a2ebc6-90d8-4fc9-96a0-a47deaa2cfc3/seneteminanaxudutepafi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED74 5288 bytes
SHA-256: 5ad5baf15029f0345b4a4ac34e43df11fbf3a26bd349274307a2f6e7f1e12fbd
font_01_sfnt_off0000ff7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7B 10348 bytes
SHA-256: 75295b095a5d753ca96ede59bbb519cf94f9775999f76bd30fc50e39d27982aa
font_02_sfnt_off000122fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FA 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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