Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d91e20bdbe98ec1…

MALICIOUS

PDF

94.1 KB Created: 2020-12-20 08:03:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f0ce905b35f3c56e42b1b472b6f48edc SHA-1: 51e17ed45bcda3d1a6db66ce455c24ffe310f754 SHA-256: 4d91e20bdbe98ec1090445729335d3280c6f5298dbd0cc3b700fa6f60436ef83
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 that is presented as a search result for a coin, likely a social engineering tactic to entice users to click. No scripts were extracted, but the PDF structure itself facilitated the embedding of the malicious URI.

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://traffnew.ru/strik?utm_term=1903+indian+head+penny+mint+mark PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368500/normal_5f942e9b594fb.pdfIn PDF document text
    • https://zasetumodoroba.weebly.com/uploads/1/3/4/6/134692621/5284713.pdfIn PDF document text
    • https://nutifikidejuz.weebly.com/uploads/1/3/4/3/134347692/wibige.pdfIn PDF document text
    • https://disadaniti.weebly.com/uploads/1/3/4/4/134463451/6993659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393632/normal_5f9a2d62a6a43.pdfIn PDF document text
    • https://texanajak.weebly.com/uploads/1/3/4/0/134018539/70e1f1568fb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459165/normal_5fa24516b5b67.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/minegikukovel/25685785653.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5223f2cf09257bd870b0d/t/5fd61b04034a586a4f3b03e2/1607867141032/41720814885.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5355c24b06a7eb31bb18b/t/5fca61abcba3ec7529478141/1607098795612/70556400295.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/mega_bubble_minute_to_win_it_game.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000125c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C0 5252 bytes
SHA-256: 09a5bcb8953f483223993bc3f23ec55ab66f7228006c913b65c4e564ddaaee77
font_01_sfnt_off00013766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13766 11272 bytes
SHA-256: 8a9573d7d3a87fd761095c2deb0b0d814f0d6ade1a3c031275f4e3c0e309bc30
font_02_sfnt_off00015de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DE8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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