Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1c282ce08dcdf19…

MALICIOUS

PDF

69.7 KB Created: 2020-12-17 12:33:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c20c4fcce82f299930b08fbf40f28694 SHA-1: db83461ef00337f6828a9da57c4163ed9ff69753 SHA-256: f1c282ce08dcdf19acda1b6ae476e44ef32a88f528cd0deaedcb34609cad095d
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body contains a cryptic message and authoring information, but no executable scripts were extracted.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/123?utm_term=don%2527t+push+me+cause+i%2527m+close+to+the+edge PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376601/normal_5f99197f75ea1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476930/normal_5fceaaca136ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_5fbc66c9872a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370541/normal_5f8c1de82560e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374843/normal_5fd7b3702415d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494889/normal_5fc28c1f6692b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391611/normal_5fa68015163e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379848/normal_5f8db4e02fe6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385038/normal_5f9f9df4a1f6b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b111d178-3616-4b2b-a4e2-27ad9a56f577/62741814550.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e8776ae-833f-49c0-a815-2a71954c170d/74143794866.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/jizoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46d55b19-5978-4882-9673-7cf3e34cdefe/22808479937.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae9073db-0e25-4fa6-97c6-594b76ea221b/85635018563.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/candara_font_windows.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_off0000d30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD30C 5424 bytes
SHA-256: e4bf6d3710f8a73eb1c64ddc2dba0c06d8e91a55eb97d994e5a14218e1e6b4bb
font_01_sfnt_off0000e567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE567 10652 bytes
SHA-256: a803e560dc31da47441874a7c33d130361e9434559c22329521e42b580f3743c

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