Malicious PDF — malware analysis report

Static analysis result for SHA-256 776f5ea5b2bee853…

MALICIOUS

PDF

81.3 KB Created: 2021-01-17 04:00:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f3d9ee16017c825c356092d21a6468eb SHA-1: eaa24e3410093459b3ff8557bf1302a72dcdd307 SHA-256: 776f5ea5b2bee85303ee20c222d5134b5b3c77019ae3846cc1ffd2cebe90a71a
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://traffking.ru/123?utm_term=lens+or+lenses+plural'. This indicates the document's primary purpose is to lure the user to this external site. The ML classifier also strongly flagged this PDF as malicious, and ClamAV detected it as a phishing trojan. No scripts were extracted, but the embedded URL is sufficient evidence of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://traffking.ru/123?utm_term=lens+or+lenses+plural In PDF document text
    • https://static.s123-cdn-static.com/uploads/4492871/normal_5ff6af7d14351.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404740/normal_5fecae9a1a1bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456399/normal_5fa85651217b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468550/normal_5fe02fbbd8032.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415309/normal_5fc5d26b8fb05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vunizi/atorrent_apk_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/free_student_software_autodesk_education.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/bisitotarigotuv.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/32335492804.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/kurevuj.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/indonesia_server_vpn_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/xaroxabumuganazebabexo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A1 3188 bytes
SHA-256: fbf60df4615f60ac3ed7f1a682fb2e66ef81ce3853658860571163adfd6a885c
font_01_sfnt_off0000e409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE409 4752 bytes
SHA-256: 4c61e66112c3fe4a08960d5f0688e1ea7b2eeab76d344e1dea8427b3b797feda
font_02_sfnt_off0000f43f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43F 14340 bytes
SHA-256: f9f1a46c391e4f6af34fb72b96f718f928beb039192a71d5f5b8fd89d7f4bdfd
font_03_sfnt_off0001217a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1217A 16620 bytes
SHA-256: 45afa8a44571520c1186e65c5b28896e52673f5fc22d2d8a33ab39ea45faff26

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