Malicious PDF — malware analysis report

Static analysis result for SHA-256 7653f5e631bb3b36…

MALICIOUS

PDF

70.4 KB Created: 2021-01-03 05:53:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 667089d78d89cbabfaba3894e8000319 SHA-1: 2a1878160518423eb0fcfe156f9cefdd4eda3e63 SHA-256: 7653f5e631bb3b36d177bec5154dd8002b0875de37a4260f064f88855a42a41b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://traffine.ru/123?utm_term=sloppy+mechanics+stage+2+turbo+cam'. The ML classifier and ClamAV detection further support its malicious nature, flagging it as a phishing trojan. The document body, though heavily obfuscated, contains strings related to software components, suggesting a lure to disguise the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/123?utm_term=sloppy+mechanics+stage+2+turbo+cam In PDF document text
    • https://cdn.sqhk.co/xedufoga/6Jheiih/sarupopuvezajuwugos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379363/normal_5f9790c396f1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497359/normal_5fcaaafa75c82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476954/normal_5fe54c8ead386.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487918/normal_5fed404a86eb8.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzonabudad/QiaKxgf/logo_quiz_answers_level_5_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/xoradofexul/fieiihh/18410002708.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388062/normal_5f95b07ec6edc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369629/normal_5f91d4e705b6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5f8d9405bbdf0.pdfIn 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/4adf9b3e-858e-49eb-af90-dc9e957fe8e3/kowez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9fb1202-1842-4162-bdcb-ebb812aecbe5/zogubojunimavobomopukemen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d57f7f24-0582-4d32-adca-471661689adf/82633547141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d583f46-a93f-453b-a438-917aab3c87e3/air_attack_2014_activation_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59bdd836-09e5-4571-bb03-22f8cb198e3b/8367911746.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4002754-997b-49e3-8655-61fc757d3ad4/siposiwexaburifebivid.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_off0000cc01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC01 5824 bytes
SHA-256: 68bb0148bd69d5e5dc29bc07d0ae65875d60ccc4057665853b0e3a19c9629165
font_01_sfnt_off0000dfb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB2 14172 bytes
SHA-256: d91b99783884332744552f4ac0226f82b70ba753f44b9a4bcff9ca3deb95495b

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