Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b4f068f3ad57a3d…

MALICIOUS

PDF

72.8 KB Created: 2021-02-23 11:44:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4026c2c6f309155f6f67328aae12663d SHA-1: 24d6b42879e8ed31649eea32e1fb1240bfb401d4 SHA-256: 3b4f068f3ad57a3dd5b45533466773c1eac251892e245e00ddc69dfa8eeca0e1
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that masquerades as a Cuisinart coffee maker manual, likely to trick users into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wix?keyword=cuisinart+compact+single+serve+coffee+maker+manual
    • https://static.s123-cdn-static.com/uploads/4500453/normal_5fe3f6c546068.pdf
    • https://cdn-cms.f-static.net/uploads/4403822/normal_6027385e0b0ba.pdf
    • https://static.s123-cdn-static.com/uploads/4413239/normal_600574606649a.pdf
    • https://cdn-cms.f-static.net/uploads/4474985/normal_602bed5ab4f36.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mulerux/63338866903.pdf
    • https://s3.amazonaws.com/resisuna/xbox_360_controller_driver_windows_7.pdf
    • https://s3.amazonaws.com/pafexegud/22441288571.pdf
    • https://s3.amazonaws.com/wixanarer/xevuwomufofexekisorozipoj.pdf
    • https://s3.amazonaws.com/lowebemuwojiso/avanza_veloz_2014_manual_surabaya.pdf
    • https://s3.amazonaws.com/fovezewi/67318303231.pdf
    • https://s3.amazonaws.com/sezewu/funeral_invitation_template.pdf
    • https://s3.amazonaws.com/megulu/wekotixoruxepu.pdf
    • https://s3.amazonaws.com/xufaxoferugod/nibarufepod.pdf
    • https://s3.amazonaws.com/dedinavesute/dyson_cordless_attachments_guide.pdf
    • https://s3.amazonaws.com/turip/67746233601.pdf
    • https://s3.amazonaws.com/galinikagopit/16718357475.pdf
    • https://s3.amazonaws.com/faxaxos/lowamesusefevosijetof.pdf
    • https://s3.amazonaws.com/nitajosasa/menabudugosejedomazozilu.pdf
    • https://s3.amazonaws.com/lolaritemukole/how_to_play_munchkins_game.pdf
    • https://s3.amazonaws.com/donake/slideshow_template_after_effect.pdf
    • https://s3.amazonaws.com/lososimap/29263802842.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_off0000df32.bin
81f92b4442789a20177b45f23a1357cb68103eed97ca28c9c30e9b977041aea1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF32 5364 bytes
font_01_sfnt_off0000f168.bin
85177355653f88a0b1133b4c31060f0e47924b69ea32ade654db00b297b1cd6d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF168 10560 bytes