Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdd50e007beb088a…

MALICIOUS

PDF

76.5 KB Created: 2021-01-21 20:47:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 96eb4404c8ecd78ad030aea62d11e1e7 SHA-1: de8af9ba8017693b8dc5e6f516bfd93340e986f9 SHA-256: cdd50e007beb088a0979abc738dd2833f2ae9f5e34d5320b1bddab3e487e4843
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL pointing to 'trafftec.ru', which is likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to 'abiotic factors in the indian ocean'. No scripts were extracted, but the presence of embedded URLs and the phishing classification strongly indicate a social engineering attack.

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
  • 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=abiotic+factors+in+the+indian+ocean PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454041/normal_6008cb24259be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493610/normal_6000506244c8c.pdfIn PDF document text
    • https://cdn.sqhk.co/sanozusu/ejd2Mic/harry_potter_hogwarts_mystery_cheats_iphone.pdfIn PDF document text
    • https://tipuxefisabe.weebly.com/uploads/1/3/4/8/134846761/2181043.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404757/normal_5fe0648b1f008.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/d1gj9xP/59716119091.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407084/normal_5feb228fa2503.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369495/normal_5fd3589aaa4c3.pdfIn PDF document text
    • https://radugimexeb.weebly.com/uploads/1/3/4/8/134880062/18f306c011bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464070/normal_5fd64317c4a05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471230/normal_5fed3deb31899.pdfIn PDF document text
    • https://rogapasutidubu.weebly.com/uploads/1/3/1/4/131438129/kukavemiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414687/normal_5fef6343bb8d4.pdfIn PDF document text
    • https://jesisime.weebly.com/uploads/1/3/4/8/134886507/tokor_nuririgo.pdfIn PDF document text
    • https://cdn.sqhk.co/movozuba/Mjbha2N/31399426018.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366027/normal_5fcd11b8e8665.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/OjfThjA/pro_referral_home_depot_phone_number.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ecd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD9 5208 bytes
SHA-256: 72b4812a4402bc698285b251d14eab0765af01e64f1bb0d48f1b33623d2e395f
font_01_sfnt_off0000fe8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8B 11576 bytes
SHA-256: bf9a62313e99b2c86abd7bfd80347a36eb61bb3dcca9b7b57ca673ec094d5d94

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