Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d4ec2fc59ba4858…

MALICIOUS

PDF

66.8 KB Created: 2021-02-25 08:43:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b72da89d03a16d9599070942905702e7 SHA-1: ad9e4e93936c8c80c55de53ce1a00d6d96ff2375 SHA-256: 6d4ec2fc59ba48580b8fd5fb5d243e4bd74205d8fef11bb5610f0a66cb7cdc6d
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 'seumenha.ru', which is likely intended to redirect the user to a malicious site. While no scripts were explicitly extracted, the presence of embedded URLs and the high confidence detection scores suggest a phishing or credential harvesting attempt.

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://seumenha.ru/123?utm_term=firehouse+subs+steak+and+cheese+nutrition PDF link annotation
    • https://jovigazever.weebly.com/uploads/1/3/1/6/131637362/3549607.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501993/normal_5fe3025461850.pdfIn PDF document text
    • http://websporizlehd.com/project_cerberus_1._4_2pkcrw.pdfIn PDF document text
    • http://rezokaxibipoj.22web.org/on_the_road_lyrics_meek_mill.pdfIn PDF document text
    • http://tufezoba.22web.org/fluke_5522a_user_manual.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/5245842.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500453/normal_5ff81e714111e.pdfIn PDF document text
    • https://xutepokukofegik.weebly.com/uploads/1/3/5/3/135391302/915831ab40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502698/normal_602ff1cfd739d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486552/normal_5fcc1b0392808.pdfIn PDF document text
    • https://pawomasa.weebly.com/uploads/1/3/4/7/134737305/3616535.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414161/normal_5ff9211fc683a.pdfIn PDF document text
    • http://zajifokabatu.iblogger.org/62653082350.pdfIn PDF document text
    • https://dovezoluwebib.weebly.com/uploads/1/3/4/0/134017866/7432952.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/patilawasu/34956658865.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/2386788536.pdfIn PDF document text
    • http://nebaxowowugi.rf.gd/115127938.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_off0000caed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAED 5156 bytes
SHA-256: 4f271cf55dc5ff2c48524ace96206823d5cca027571f29a758adfefa8412173a
font_01_sfnt_off0000dc69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC69 10012 bytes
SHA-256: bc2ddb51ddb6fbf358fc00bb12bab345053032f15c53fd4b210bcfc50b005fc2

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