Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e36d1ce77cd3c7…

MALICIOUS

PDF

70.9 KB Created: 2020-12-03 06:58:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 68010d8b1cfd1ec9da7349a6954d5c25 SHA-1: e999b3267f0af4ab9a9dede714088e8d147227d7 SHA-256: d2e36d1ce77cd3c7a6a9ffe858660a668df4aa26e04c46b1a04add6e2d808b5e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, specifically flagged as a phishing trojan. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to direct users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=pathfinder+kingmaker+paladin+build+stats PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446944/normal_5fb8ecdd412e2.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/mefebufurok_woketuvofi_mepuzirofukig_loroguzosipakuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371790/normal_5f90dc46b3732.pdfIn PDF document text
    • https://nuzimalufugi.weebly.com/uploads/1/3/4/7/134705392/gorebujujipad.pdfIn PDF document text
    • https://kagodititaf.weebly.com/uploads/1/3/4/8/134868324/142960.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/zuxadol/zowifefafokexavitupesupi.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/juremedifefujilutab.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2ed17e7202640ea1bf0/t/5fc1b47c9d79364840cda9ab/1606530172979/wasamakumozegexijovujexo.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/rilaviw.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/27295488778.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc15df1e9fc3622d5255c20/t/5fc3fecea97599144e7435e7/1606680271628/wadizeveso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3f91a9e-2296-44dc-8b98-8121b063b448/rulalododuxela.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3968c86b-c236-49e9-b932-6e9e57b46682/54470715250.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_off0000cbad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAD 5432 bytes
SHA-256: 65f787671b05e0ef96fdbafdb3f9468cd64493b8a3e1fd23f011639154ab5eb0
font_01_sfnt_off0000dde8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE8 10400 bytes
SHA-256: c25e2d958ee42303303bb93da6ef2290116b85bc055e987db142ca3de642d9b9
font_02_sfnt_off0001006c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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