Malicious PDF — malware analysis report

Static analysis result for SHA-256 a42e6e03812edef7…

MALICIOUS

PDF

62.7 KB Created: 2020-12-17 12:07:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 604ab0c1e4cebd3c36d55fc3b2ca3841 SHA-1: 773bb9c6d7d65511add0f2198de484fb3d997139 SHA-256: a42e6e03812edef78d80e6870a0a5e0a093bf3b33528bd64d5955b7b72d8aca4
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/strik?utm_term=international+thespian+festival+2020+location'. This indicates the document's primary purpose is to redirect users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/strik?utm_term=international+thespian+festival+2020+location In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e20237d8-17e4-4c42-b3a8-f6250c2bc01a/bevufe.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/econometrics_by_example_2ed.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/45557791245.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/blank_february_2019_calendar.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/monster_hunter_world_mega_nutrients_permanent.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5169dbe9b69395125da21/t/5fceb4d506785e60cf013fce/1607382230387/world_racing_game_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/guvemizurivatigotoxemoriz.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/best_mousetrap_car_designs_for_distance.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/toxufunutiziwibiviwozoju.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/itunes_32_bit_old_version.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/bsa_space_exploration_merit_badge.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfeed64be903ae640b189/1606221549735/xia_legends_of_a_drift_system_ebay.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/wezuwuj.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB828 5372 bytes
SHA-256: 3d60cf5fe694cb08ffe0602202fdce6e1428c907629798da9c3a8f72a484a76c
font_01_sfnt_off0000ca75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA75 10388 bytes
SHA-256: af9f8fabebaf1305f6c7533da99df4a959dfc62f06ec770bff6896a5cf8d05cb

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