Malicious PDF — malware analysis report

Static analysis result for SHA-256 e86806cce0502a33…

MALICIOUS

PDF

76.9 KB Created: 2021-03-02 23:30:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 9f8247bbd64bbdbb0b6a5a4486239fc2 SHA-1: f2235b1412d53297fd2ad8bf13d386659a1e6495 SHA-256: e86806cce0502a33e86857ddfde421e91abe5b0b881e76f8e4652488abae8bec
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'kuzutuzo.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

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://kuzutuzo.ru/strik?utm_term=how+do+you+focus+a+celestron+telescope PDF link annotation
    • http://magazinrf.xyz/4487082047771xpa.pdfIn PDF document text
    • https://cdn.sqhk.co/nugopanage/Subo3id/11144671021.pdfIn PDF document text
    • https://cdn.sqhk.co/xobabowiwa/jija9gh/sanitarium_movie_review.pdfIn PDF document text
    • https://cdn.sqhk.co/retagigimusa/cKjdYun/game_f1_2016_android_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xegunorasu/iXihQBu/new_england_colonies_social_issues.pdfIn PDF document text
    • https://cdn.sqhk.co/fetumamuv/hiyiagd/40832903165.pdfIn PDF document text
    • http://ninavadilu.22web.org/semesedixos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/neonatal_jaundice.pdfIn PDF document text
    • http://siduxosezuk.rf.gd/try_again_jaehyun.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/bluestacks_pc_offline.pdfIn PDF document text
    • http://mokisot.epizy.com/nakopavutana.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/68843941551.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/how_to_get_rid_of_bad_feet_smell.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/32885992066.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/30_day_eviction_notice_template_georgia.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9E 5304 bytes
SHA-256: 7b86ecc21489986baa9f903e9556c5b6d7c273f86bc1310d136b61fb459df239
font_01_sfnt_off000100d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D4 11164 bytes
SHA-256: 540663022a393d1927c19c6e46f6d51a04ba6105ec02b81f116150edeb335ae6

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