Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a59aee04c4bb0d2…

MALICIOUS

PDF

68.2 KB Created: 2020-12-23 07:01:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2be0ed8e67ff90667d6afbbd56a5429a SHA-1: b8aa9c883230f7b6d1a721f2efddcff4c035a2a3 SHA-256: 3a59aee04c4bb0d2274a76249a8c9bd7532f06af2054ef7d28fee61c5c61ea2e
154 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'. ML classification and ClamAV also flagged this file as malicious. The document body, though heavily obfuscated, appears to contain metadata related to the wkhtmltopdf tool, suggesting it might be a crafted PDF designed to exploit vulnerabilities or lure users to malicious sites.

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
  • 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.
  • 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=what+does+play+tennis+mean+in+french In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcff5279c08c7f2b9f49b2/1606221676581/wifotimerorakatadasel.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/busufovakoledadapesubuza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0d234de-5090-4def-8e05-cc3aa1be0b25/rupiduwirowotixewif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94e6c426-6e43-4d79-8c9b-22ac38bda4c1/zufetojotovex.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/2734900821.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/4037758471.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d52e3dfdd95b60d4bb65/t/5fcca249eb18547f4b800fa6/1607246410462/flight_status_map_delta.pdfIn PDF document text
    • https://s3.amazonaws.com/taguxif/epel_repo_for_centos_6._9.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aebf7308-c931-436a-8086-083db9369df3/arreglos_iglesia_boda.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/towogirijubibefuzeseto.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcee64e94f25741fd49f96d/t/5fd0c42c8f1ddd5ccbe472cb/1607517232742/free_wheel_of_fortune_casino_slot_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/sticker_maker_apk_stickify.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/animal_planet_sky_tv_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc9bbe50f46d6500014148/t/5fdcf69d9ad12816a8bfcd4c/1608316574391/mobile_money_in_south_africa_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19a6ee85-f775-4c2d-970f-b8cea1721357/xibufifafi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdfd849d7936484054ae67/1606286726815/car_rental_agreement_enterprise.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_off0000cc91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC91 5508 bytes
SHA-256: e94ed8f42eda5dbe991c52e7b0b200dafe1098547ec428e110da764f3bb84084
font_01_sfnt_off0000df3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3A 10904 bytes
SHA-256: 713f9b8fd0a2fe7659126ab2a66d03f466a2a51bdadad7852f070a8d139359ab

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