Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad22d55d5fbb8819…

MALICIOUS

PDF

80.9 KB Created: 2021-02-20 10:36:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f09a0a31bae366f451e6814b44390138 SHA-1: 2819e5643bded172b1a2a18992ba019344c0caef SHA-256: ad22d55d5fbb8819bf7b372c3412e0819cda4d800f4946b4afd3f0ac33da2901
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded URIs pointing to external websites, suggesting a phishing or malware distribution attempt. The presence of these external links aligns with the Spearphishing Attachment technique, as the document itself is likely delivered as an attachment. No scripts were extracted, but the embedded URIs are the primary indicators of compromise.

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://leonvi.ru/wix?keyword=minecraft+void+block
    • https://tudaluvakagovax.weebly.com/uploads/1/3/4/6/134614365/1468127.pdf
    • https://cdn.sqhk.co/gafisasiwu/gjbPHji/escape_logan_estate_chapter_1_act_3.pdf
    • https://static.s123-cdn-static.com/uploads/4370530/normal_5ffe26ad924a6.pdf
    • http://mebezikad.22web.org/9888849199.pdf
    • http://bovosidifusu.iblogger.org/today_calendar_sheet_tamil.pdf
    • https://cdn-cms.f-static.net/uploads/4369794/normal_6027c5a96ca4a.pdf
    • https://kijidagidopijub.weebly.com/uploads/1/3/0/7/130776406/nenakesodof.pdf
    • https://diriremipujuna.weebly.com/uploads/1/3/4/2/134265666/981589285c44829.pdf
    • https://static.s123-cdn-static.com/uploads/4374380/normal_6009022b94e05.pdf
    • https://cdn-cms.f-static.net/uploads/4481836/normal_60183728199d0.pdf
    • https://cdn-cms.f-static.net/uploads/4369773/normal_602594492afd1.pdf
    • https://static.s123-cdn-static.com/uploads/4414502/normal_5ffc2bd8dec60.pdf
    • http://nefuzixitelu.iblogger.org/filehippo_photoshop_cs6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nutonujisebife.epizy.com/descriptive_research_sample_thesis.pdf
    • http://xibunagevidaze.rf.gd/notekokaj.pdf
    • http://laxiruzeremifam.rf.gd/histology_guide_slide_box.pdf
    • http://matujuluji.epizy.com/pizixazoge.pdf
    • http://modunatotuw.epizy.com/best_android_browser_that_can_videos.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa21.bin
5dd0712a68090d50c3f29d95a4aa2569d727ae17d8c87cf8d0b2984f5b0fbf85
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA21 5104 bytes
font_01_sfnt_off00010ba3.bin
bf8c8c87e34e1bef4de8dba105430d796a9df563636d5faa75884efd565e76d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA3 13312 bytes