Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe8a451bb63a8a49…

MALICIOUS

PDF

77.2 KB Created: 2020-12-01 22:22:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d13236dd6fb4f47180a83cb29520c2bb SHA-1: 93cea69e8df75021b6c4f7a54e216b4553c70e6c SHA-256: fe8a451bb63a8a4930544f193b9b8bb4240735e1d4791135baca3aa7fd66f50f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafffi.ru/strik?utm_term=congruent+triangles+rules+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5fab1f4489c5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450439/normal_5fb3342f15167.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366346/normal_5f91f254ca755.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454286/normal_5fa0dae168cf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f94358aef47c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477137/normal_5fb5725ba0b0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454043/normal_5fa3cb3a8e13a.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://static1.squarespace.com/static/5fc1480d27a199023ab7f389/t/5fc2abf161e25426e18f3ec7/1606593523769/19803834277.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/instrumental_analysis_acs_exam_study_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc141a05687f52b6b83892d/t/5fc505cc3f75b1664371db54/1606747596772/rukime.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/media_player_android_studio_source_code.pdfIn PDF document text
    • https://s3.amazonaws.com/rimadefule/lodug.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA67 5112 bytes
SHA-256: 841429899f7fc63c34669b48b630fbc8715ea892a6bc5e90ce506aceae61816b
font_01_sfnt_off0000dbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD8 11712 bytes
SHA-256: 93455f8be040d588bb2f954dcd4bbde4cc99477f3ed0655adee566b2df561c37
font_02_sfnt_off000103e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E9 16296 bytes
SHA-256: cea1b45d7c244c31dafd288f939a51c2886dc4df39871290b64df9ce81d6cdd4
font_03_sfnt_off00011998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11998 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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