Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad6adc3ba58f84f4…

MALICIOUS

PDF

80.2 KB Created: 2021-03-19 08:25:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6497fe5328fcc525cc4ff37cf4b6cd02 SHA-1: 2a263f6485fd4d23d4a18b8c1146938a057ccca4 SHA-256: ad6adc3ba58f84f4e83b35c3424971afe40a8c34f536ba031208ea67897b4b6b
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to 'zajinet.ru', which is suspicious and likely serves as a lure for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to redirect users to malicious content.

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://zajinet.ru/123?utm_term=song+naina+barse+rim+jhim PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417315/normal_5fed1cdfdaed2.pdfIn PDF document text
    • http://xerunifojukako.22web.org/arabic_textbook_class_9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475864/normal_5fd089d8d633a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465907/normal_5ffa1e176582e.pdfIn PDF document text
    • https://cdn.sqhk.co/sazipuvaxiv/gcHaRSC/that_s_life_mac_miller_sia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373985/normal_6006ad7ef3299.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458163/normal_5fd286d9c3d09.pdfIn PDF document text
    • https://cdn.sqhk.co/xusarukave/ifFLlii/slender_insane_labz_opiniones.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/tivejigobukipalot.pdfIn PDF document text
    • http://sizikipap.epizy.com/50398862799.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/woximufukojikizo.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/sizogor.pdfIn PDF document text
    • http://vasedazixi.rf.gd/73850177394.pdfIn PDF document text
    • http://fetakeseravisu.epizy.com/where_did_i_come_from_book_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/sakisitewebeko.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/35054659144.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/baby_cat_sound_ringtone.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_off0000e8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E5 5388 bytes
SHA-256: 15b3e7200f44427a0d35c45f08b89b15171a7a7752e338cc13ca31fbd939f88a
font_01_sfnt_off0000fb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB10 11544 bytes
SHA-256: 1b8fb46ec70bffec7d421d5cf66217f7e971368e7b7e4d30e446a05889bbc1cc
font_02_sfnt_off0001228d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228D 4640 bytes
SHA-256: 90f24e9c1abab8c4215afce331a51ab3eb5df93a8aa484e472dfc67b7869dc12

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