Malicious PDF — malware analysis report

Static analysis result for SHA-256 66943a80563de66c…

MALICIOUS

PDF

93.0 KB Created: 2021-03-14 10:53:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08749bf78f88a3eeed5a82093a2dbf4a SHA-1: e33b382a7b97c6b9d39074b14281471ca1f90048 SHA-256: 66943a80563de66c6c69f665110ae831e6fa54ac9764cd02cc5dc512d3e54f36
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that likely leads to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a harmful resource, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://zajinet.ru/strik?utm_term=how+much+will+cost+to+install+a+garbage+disposal
    • http://giwosesupalu.medianewsonline.com/tejiwufigepopara.pdf
    • https://wodiwige.weebly.com/uploads/1/3/5/3/135317556/lalavebiwipolul_sarusevenuxuvis_temol.pdf
    • https://cdn-cms.f-static.net/uploads/4451027/normal_600b4e0f7da28.pdf
    • https://jatilupek.weebly.com/uploads/1/3/4/4/134491857/638f8f6bd.pdf
    • https://static.s123-cdn-static.com/uploads/4482853/normal_5fddb1b0d0318.pdf
    • https://cdn.sqhk.co/kisasizaro/Ze1iji1/65765243837.pdf
    • https://cdn-cms.f-static.net/uploads/4454803/normal_5fd9cee97c466.pdf
    • http://katipef.medianewsonline.com/how_to_add_kwikset_to_z_wave.pdf
    • https://cdn-cms.f-static.net/uploads/4476939/normal_6026538e73d33.pdf
    • http://zibepifutidi.sportsontheweb.net/ziritulitirasimedajika.pdf
    • https://duzesoduvumasu.weebly.com/uploads/1/3/4/1/134131570/gadefa.pdf
    • http://fewafef.iblogger.org/22838849841.pdf
    • https://lijepaxo.weebly.com/uploads/1/3/5/3/135324298/sulasukebuseziz.pdf
    • https://cdn.sqhk.co/kixowijeka/iijajiI/best_english_movies_2020_released.pdf
    • https://cdn.sqhk.co/tinolefowi/gfnihjc/digidesign_mbox_2_pro_price.pdf
    • https://static.s123-cdn-static.com/uploads/4409093/normal_5fcd99fcea9a0.pdf
    • https://cdn-cms.f-static.net/uploads/4483082/normal_602687f2a0cb0.pdf
    • http://kugewezebuvigiw.mygamesonline.org/computer_system_class_9.pdf
    • https://cdn-cms.f-static.net/uploads/4385427/normal_60161a35a89ff.pdf
    • https://cdn-cms.f-static.net/uploads/4412757/normal_60318ca815d83.pdf
    • https://cdn.sqhk.co/rufebumu/jhihjey/7861436565.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jomabav.epizy.com/41912551802.pdf
    • http://kubowulurarekij.myartsonline.com/13070394483.pdf
    • http://ronufabadexulab.epizy.com/lagu_cakra_khan_baru.pdf
    • http://bimekikup.epizy.com/skype_for_windows_xp_7_free.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_off0001296d.bin
7dc2ac3fd5f5be287f05e1abb1e27559c558806e0c2445a2f794de0e75cbc06a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1296D 5680 bytes
font_01_sfnt_off00013c9d.bin
81f264f49a8a7aa885b75ef2d89df703975877063ec9c0ac6b303110da9dc580		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C9D 11836 bytes

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