Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b6d969783e10700…

MALICIOUS

PDF

114.6 KB Created: 2021-01-12 14:55:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 1de35eba28b1bded629c883b007b714f SHA-1: 758499dbdfd67efff5c7aee0c71f442ff2f0512a SHA-256: 3b6d969783e10700ae1fb39b876b2a4a75381158a9c5de9e3c3faa66a12d4fbd
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafftec.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and the presence of an external URI suggest an attempt to redirect the user to a potentially harmful site.

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/123?utm_term=naruto+shippuden+tenten+husband PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4449602/normal_5fddd71f360ff.pdfIn PDF document text
    • https://cdn.sqhk.co/nupasoxure/bq9Zgja/tie_dye_sweatpants_and_sweatshirt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406463/normal_5fa5da7645309.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f88a02b7d87f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453142/normal_5fc1123aa190d.pdfIn PDF document text
    • https://cdn.sqhk.co/lodikorep/xJ70jcP/capitol_theatre_yakima_washington_events.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/memul/definition_of_capitalism.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/apple_music_apk_4pda.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/netflix_windows_10_exe.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/quran_app_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/10230185933.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/what_inspires_you_funny_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/natezeremovirosorexura.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17116 5124 bytes
SHA-256: 98dc7afcc1d25e9772d94c720adc45a9c8cb04f08260eb2d06c85bc27d994fa7
font_01_sfnt_off00018275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18275 11260 bytes
SHA-256: fd3cc242b27ba373cc7ef3351a408fe15c6ac9cf6d69f977f8e362cfda0bc0ab
font_02_sfnt_off0001a7b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7B0 16208 bytes
SHA-256: 8edefa958e800d0e09d4b0a7a4828844f4c6b6de95b1cb5eecd0ecd2ac2aa46c

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