Malicious PDF — malware analysis report

Static analysis result for SHA-256 726701d300498390…

MALICIOUS

PDF

78.6 KB Created: 2021-03-10 13:16:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdccb5c3d3840e0c8be568c5977181c6 SHA-1: ed029f28740a3357cd7db4f329433ca550e19a8c SHA-256: 726701d30049839006b75bdbb1bd19fe20d125fb9c3644dea52df2a768dcfca9
104 Risk Score

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 heuristics indicating the presence of external URIs and a visual download button. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF format and embedded URLs are commonly used for initial access via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zajinet.ru/wix?keyword=focus+on+grammar+1+pdf+download
    • https://static.s123-cdn-static.com/uploads/4486550/normal_5fde61bd68b0c.pdf
    • http://verupedobonunaj.22web.org/ff7_remake_stuck_in_shinra_building.pdf
    • https://cdn-cms.f-static.net/uploads/4479678/normal_6017b40318775.pdf
    • https://cdn-cms.f-static.net/uploads/4376870/normal_604242a2be9f5.pdf
    • https://static.s123-cdn-static.com/uploads/4484804/normal_5febd486a3089.pdf
    • https://cdn-cms.f-static.net/uploads/4370051/normal_6038147384fc9.pdf
    • https://static.s123-cdn-static.com/uploads/4490366/normal_5fdfb6b181299.pdf
    • https://static.s123-cdn-static.com/uploads/4366045/normal_5fc9cce88e8e1.pdf
    • https://cdn-cms.f-static.net/uploads/4366646/normal_600cc5b2d94d5.pdf
    • https://cdn-cms.f-static.net/uploads/4494149/normal_5fd9b25cd1208.pdf
    • https://cdn-cms.f-static.net/uploads/4412170/normal_60304088ac84b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_00132ba0eab84a8e81ade5c9f6555a69.pdf?index=true
    • https://uploads.strikinglycdn.com/files/863a520b-f152-4178-a245-acb9897285fb/fafagenid.pdf
    • http://zewogukanonudut.epizy.com/jbl_endurance_sprint_user_guide.pdf
    • https://8035c368-62b5-4e0f-b07c-73fd2baf85c9.filesusr.com/ugd/2ee8d4_0f05283d94df4ea4bcfc6cfb3d909735.pdf?index=true
    • https://uploads.strikinglycdn.com/files/975a2afe-e2f3-497f-83cf-592ce5c23757/sizok.pdf
    • https://uploads.strikinglycdn.com/files/27352b58-45e5-431f-be47-25017c0204ca/around_the_world_in_80_days_characters_movie.pdf
    • https://uploads.strikinglycdn.com/files/c30c11b0-764e-41e6-b450-2e01d688c6b7/54916112200.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9c0.bin
14e8b1c3139fe7a31f1b594807f3b4cd69f9a66c772d34727e1f69020f722c9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C0 5212 bytes
font_01_sfnt_off0000fb67.bin
72fb9211e39fb5d3b146cc334e3a7d6ca2ad7e8d32a6afe128d478b9350d2cb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB67 10800 bytes
font_02_sfnt_off00011f66.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F66 4324 bytes

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