Malicious PDF — malware analysis report

Static analysis result for SHA-256 cac5d4422564b39b…

MALICIOUS

PDF

77.6 KB Created: 2021-02-05 21:36:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4a37145fd42eb6f59d87be15dc310488 SHA-1: c21fa8bd441dccecf401a1406acc39621371b978 SHA-256: cac5d4422564b39b22f0572ee6590c09d235182d5862d8a9ed427dd603bbc07d
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://druttle.ru/aws?utm_term=ajax+post+file+formdata PDF link annotation
    • https://cdn.sqhk.co/pidodalatip/fpmNy7I/85603027665.pdfIn PDF document text
    • https://cdn.sqhk.co/womawuxinuge/Thbjhn3/vejexumunebosipavexaborir.pdfIn PDF document text
    • http://itdiscount.info/1459866439lwfu.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/jgjbaja/93403558739.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/hbIiiie/nizuvunirazigisufiz.pdfIn PDF document text
    • https://cdn.sqhk.co/xexanodu/dgghddg/hollywood_picture_quiz.pdfIn PDF document text
    • http://nesobaka9.xyz/ursa_mini_pro_user_manualtagg9.pdfIn PDF document text
    • https://cdn.sqhk.co/duwokarewesu/jjkzmGn/beach_soccer_world_cup_2017_winner.pdfIn PDF document text
    • http://microdigitalmeter.xyz/40014908756o5bmz.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/hdbijjj/18698429845.pdfIn PDF document text
    • https://cdn.sqhk.co/makubeku/54n5lia/mountain_climber_exercise_workout_routine.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/hhehhhf/96418073902.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/nuruvapozixix/xevurarori.pdfIn PDF document text
    • http://vujofif.epizy.com/21208278731.pdfIn PDF document text
    • http://dujazenemelix.epizy.com/daduzir.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_off0000ee29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE29 5320 bytes
SHA-256: 3701e52bc0fddcf147e213bbd0c0ef6f31080c4fe47b671481e7d82e6502590f
font_01_sfnt_off00010035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10035 13108 bytes
SHA-256: eb96b8254f2500ca956a9f8d34653585418956f5f61edbfc5bdc4138c1a68d93