Malicious PDF — malware analysis report

Static analysis result for SHA-256 f04736d93d5b219a…

MALICIOUS

PDF

353.3 KB Created: 2020-12-22 20:01:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5aef0589df25fa7c05950400e12c9231 SHA-1: c2adbab1955765ed9c6cbbd5042c59a6e95a08ed SHA-256: f04736d93d5b219a805ec8313e44c116dfafb739b38e8232e788318e1be74011
154 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 multiple heuristics, including a critical alert for a malicious redirector link. The ML classifier also strongly indicated maliciousness. The embedded URL points to 'gettraff.ru', which is known malicious infrastructure, and the document body, though heavily obfuscated, contains text related to a 'Doraemon cartoon new episode mp4' lure, suggesting a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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://gettraff.ru/aws?utm_term=doraemon+cartoon+new+episode++mp4 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4427501/normal_5fa72b115cff7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417426/normal_5f988a3c6cdfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370080/normal_5f886790196eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f87200871a37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443824/normal_5fbbbbfae5f85.pdfIn PDF document text
    • https://gewupokisata.weebly.com/uploads/1/3/4/6/134606569/piremolotilima.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478932/normal_5fcb5f8d17f37.pdfIn PDF document text
    • https://tureduritisamo.weebly.com/uploads/1/3/4/6/134676104/99d0237e7e.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/rililesoninitivev.pdfIn PDF document text
    • https://dunidapakepew.weebly.com/uploads/1/3/4/3/134319263/5f4ca5f27.pdfIn PDF document text
    • https://fusajebotiv.weebly.com/uploads/1/3/4/3/134320253/7418871.pdfIn PDF document text
    • https://malotote.weebly.com/uploads/1/3/4/8/134872882/712068.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/wiwamoxamo/algebraic_expressions_problems_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/48289650234.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aae473a0-2673-4938-937d-164b513cb60c/97863899152.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_off00052089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52089 5364 bytes
SHA-256: bfd5262a85dae686b263b569a038fa04192cf164f1ab40325b2bea85cac64d39
font_01_sfnt_off000532cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x532CB 15260 bytes
SHA-256: 660df1fcf6cac7a4ddcd83fd21e51749b15355399b189eb2dae613bf619acb6c
font_02_sfnt_off0005610d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5610D 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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