Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb4997f1f244ed26…

MALICIOUS

PDF

34.1 KB Created: 2021-06-25 16:11:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1955fd390f0d0e4a8465bad4f657ca6f SHA-1: 8534fba787c0c010fee9bd86fd0cee3a753ece5e SHA-256: fb4997f1f244ed26ce32e75d4d9bafaa82ac778db9f626b8b36dc974e52af1db
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that lead to known malicious redirector infrastructure, specifically advertising game hacks for Roblox. The document body and heuristics confirm the lure is related to obtaining free in-game items or cheats, a common social engineering tactic. The ML classifier also strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://netcdn.co/app/431946152/roblox-vheicle-simulator-hacks-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-noclip-in-roblox-using-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-new-code-for-free-sword_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-spin_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-free-exploit-may-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-install-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-gruns-r15-script-hack_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/robloc-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/mathep_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-5-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-free-draw-pen_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D9F 22132 bytes
SHA-256: 427c3ac21af35847d52e20a3db8e0774de92a9b06deb78522323d0df7ef8838b
font_01_sfnt_off00005ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED6 19580 bytes
SHA-256: 7c20727166e8f622c1184de6695ea57ffe660a444196ddbec681c52468b07280

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