Malicious PDF — malware analysis report

Static analysis result for SHA-256 334093c45a50a2a8…

MALICIOUS

PDF

71.2 KB Created: 2021-01-17 13:04:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4cba8361e2e4918b7a34ba163b4a385e SHA-1: 0e6e6193667dc025d8a636b1aa4ce805fc9e164a SHA-256: 334093c45a50a2a852efaaf816fb115ed0c388c3fc9cb2fa478eadc8f1c9ece6
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 flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'trafffe.ru', which is highly suspicious. 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 malicious site, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/aws?utm_term=brothers+movie+whatsapp+status PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446937/normal_5fa427cd17e9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368251/normal_5f87afdd4657d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468536/normal_5fd9f577cb5df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475564/normal_5ffe84c11c8d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5fa8f0240c646.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382192/normal_5f8fe05dab701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372721/normal_5fa2ef060a9be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470537/normal_5faae67649962.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/sazixipame/miriwumotu.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/bajrangbali_song_kannada.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/59286980256.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/loach_care_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/31692989639.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/beetv_2._0._7_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/wivaj.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_off0000bab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAB3 5228 bytes
SHA-256: 86c4219374d07b26e05a4d650ab5312a1d4a1177c599bfe0f0f9271325db112c
font_01_sfnt_off0000cc5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC5D 2660 bytes
SHA-256: 3576dd373b651515f47e23d31ed66261cdf4600bff3365b97b89943213537ffa
font_02_sfnt_off0000d7c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C7 9328 bytes
SHA-256: 4ad031f9552aa7b080a80e5200cee723068f5ed914776a66324a584c68e75cc2
font_03_sfnt_off0000f7e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E7 16384 bytes
SHA-256: fb2ac63fb075d256b5587570191ecec806cb29c29da4ebedfc8653ce907d9040

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