Malicious PDF — malware analysis report

Static analysis result for SHA-256 4097975ea1bc3347…

MALICIOUS

PDF

34.4 KB Created: 2021-06-26 03:37:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0ecd04a9bb38e1acbebf9cdd239e1ef9 SHA-1: 78faddba6f4e903e2048d4116d6b69ef764a471f SHA-256: 4097975ea1bc33475b56a3c6d8104440cedd47e38292ead221ab9523d5b3e6e7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to websites that are flagged as malicious redirectors, specifically promoting 'free generators' and 'hacks' for games like Roblox and Coin Master. The document body and embedded URLs strongly suggest a lure to download potentially unwanted or malicious software disguised as game cheats. No scripts were extracted from this sample.

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/how-to-download-hacks-on-roblox-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-hacks-jailbreak-noclip_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-2all-site-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/10-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hacks-counter-blox-roblox-offensive-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hacking-scripts-to-hack-roblox-gamemodes_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/deep-chills-run-free-roblox-id_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/getrobux-info_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-prison-life-hacks_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-assassin-free-vip_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hoe-to-grt-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-assassin-aimbot-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-pets-live-in-pet-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-50-robux_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_off000030b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B7 21720 bytes
SHA-256: d992faf30c94e0ef5f20c7ffc140f8681f7ce998c9d66b444b7da6d4ceed99e0
font_01_sfnt_off000060ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60AD 19160 bytes
SHA-256: 95f748b5eaa5ed7952464843b1516df5190dd9fd5695fbd7a2ae6732e0eb05cd

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