Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f74d815862f1f49…

MALICIOUS

PDF

85.9 KB Created: 2021-03-04 06:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c94499cfb71e4f37bf491bfc6129c57 SHA-1: 20c93c33d936862407c51db3bfeac10f36aedb7c SHA-256: 0f74d815862f1f4913b10ceec08d77db25a2b809c8e8f1ae4a305915af5a5292
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, disguised with a seemingly innocuous query parameter related to nursery rhymes. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of an external URI and the overall classification suggest a phishing attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/123?utm_term=nursery+rhymes+lyrics
    • http://nefuwumimo.iblogger.org/xemavomet.pdf
    • http://pro-konditer.com/html_basics_tutorial_pointgwgzk.pdf
    • https://cdn-cms.f-static.net/uploads/4454042/normal_6016fbd8dbd80.pdf
    • http://gosoxegekiri.mywebcommunity.org/acting_for_animators_book.pdf
    • http://xifadezuzurap.medianewsonline.com/40937619621.pdf
    • http://tipofeliluget.medianewsonline.com/what_n-type_semiconductor.pdf
    • https://cdn-cms.f-static.net/uploads/4447630/normal_601c96005f527.pdf
    • http://banquepopulaire-fr.org/5210941968377mq5.pdf
    • https://cdn.sqhk.co/molivovuki/hhMwgjA/piberufagizagaxabe.pdf
    • http://matcobzor.ru/ragataxaxuvagm5xww.pdf
    • https://cdn.sqhk.co/wituruxa/80hgzJv/robot_shark_game_mod_apk_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/belopudevuzuza/what_does_hardware_skills_mean.pdf
    • http://vefazuxugog.rf.gd/free_responsive_college_website_templates.pdf
    • https://s3.amazonaws.com/luxelula/avg_secure_vpn_premium_apk.pdf
    • http://duribolatajofa.atwebpages.com/their_eyes_were_watching_god_symbols_essay.pdf
    • https://s3.amazonaws.com/bipovoromoj/doble_kara_song.pdf
    • http://pofazutufugu.epizy.com/wafowozotelare.pdf
    • https://s3.amazonaws.com/dofufiri/67038989255.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff46.bin
b2f0103bd454ef8c35d705888d9254226e17e6fcb0097e7f845696404d8839ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF46 4484 bytes
font_01_sfnt_off00010e7a.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7A 1800 bytes
font_02_sfnt_off00011708.bin
01132717b53b10d946cc89e1d19c5d05c1dc7d98a4c036bce5225557f06a07df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11708 10804 bytes
font_03_sfnt_off00013bca.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BCA 4324 bytes

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