Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c4f99e76aa8f271…

MALICIOUS

PDF

33.1 KB Created: 2021-06-19 15:06:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: dd3286961040f34f0eba503a6f3064ed SHA-1: 29ccf1db982b6431fc6857bacfb45b6fcd94d7bb SHA-256: 6c4f99e76aa8f27169d2a920bceda216669f947d921917d84c0b45c522150564
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a redirector lure, specifically linking to 'free generator / game hack' content. The document body reinforces this by displaying a URL that appears to be a lure for game-related cheats. This indicates a social engineering tactic to drive users to potentially malicious websites.

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-free-accesoirs-game-hack In PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-groups-that-give-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-speed-hack-youtube_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-lvl-7-executor-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/what-is-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-pet-simulator-noob-vs-pro-vs-hacker_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hack-slash-roblox-id_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-generator_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_off00002bd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BD5 22376 bytes
SHA-256: b54ddb2b51de1f3c28e0d93c8a7f0e925832ae61d1d49a8d99f35a38c9eb25bb
font_01_sfnt_off00005d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D01 18768 bytes
SHA-256: 43a1c2d0afcd82e775e61e55c2e0c8a016c3844b087109c53c024c689feb06a9

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