Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff06e0c3a13c2dd8…

MALICIOUS

PDF

69.5 KB Created: 2020-12-15 18:20:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 63c50bb59461ad7ac6d409233d1fc355 SHA-1: dd76e01b0ce4f1e0cf1f5b7fa3e6523ca0a32472 SHA-256: ff06e0c3a13c2dd818d79f2e881b140426d7abfa05071b4201c9df615af60e55
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://traffmen.ru/wb?keyword=call%20number%20tracker%20app'. This URL is likely used to lure users into a phishing scheme or download further malicious content. The ML classifier and ClamAV detection further support the malicious nature of this PDF, indicating it's a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffmen.ru/wb?keyword=call%20number%20tracker%20app In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374532/normal_5f9556bb50a57.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
    • https://uploads.strikinglycdn.com/files/0fddf3e6-6650-4cf9-8cf9-06102126227a/wenijotogugezevud.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54ad5cd1e280355f12c83/t/5fc6ec661d106d256bb4b49c/1606872172508/11446278343.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c02972f7-b1a2-4535-a4ee-1d70c5b83a80/tedasukiwowupabun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd1b96f1-9b9c-4e45-9717-1fb890d6fad3/que_es_tipologia.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/denunupalifaxajixudabiji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff194e6b-e592-4007-951b-cd382fad1275/rulavetonamezal.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/ielts_speaking_practice_book.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10c1368612547ed5ef44e/t/5fcfbe57e04ae82564b4085e/1607450199507/wolfquest_anniversary_edition_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/cinnamon_roll_sheet_cake_from_scratch.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/anemia_aplasica_en_nios.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_off0000c74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC74B 4852 bytes
SHA-256: b4058f7bba4e3d0fd91abe452988288b073acd48c442f0a1cddb2b83cb123f7a
font_01_sfnt_off0000d7b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B3 10328 bytes
SHA-256: 51c96054cc11a86c22addee191040ad7e5c65e61874462fa0c22fecdc23ea85c
font_02_sfnt_off0000fb27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB27 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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