Malicious PDF — malware analysis report

Static analysis result for SHA-256 346bb4001dcac9f9…

MALICIOUS

PDF

37.6 KB Created: 2021-07-06 16:44:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ec6b3789a4dad4b1deec61bf2b862692 SHA-1: 52c970479b2990b692319586add94d926a95cf09 SHA-256: 346bb4001dcac9f91ccae0a3ed32fd8ea3fbb1c93d63dff3a75f1431f8951f8a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a primary redirector URL, all related to game hacks and free in-game currency, indicating a lure for users. The heuristic firings confirm the presence of malicious redirector infrastructure and a general ML classification of maliciousness. While no scripts were explicitly extracted, the nature of the lures and the redirector suggests the document is designed to lead users to malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.tw/app/431946152/free-robux-for-kids-game-hack In PDF document text
    • https://library.elkatarie.ac.id/repository/game-stealing-service-free-roblox_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/admin-free-roblox_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/hack-apps-for-roblox-video-pc_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/robux-hacks-for-pc_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-robux-websites-that-work-2021_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-hack-points-in-roblox_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/is-roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/antlers-roblox-free_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-cheat-worthiness-crab_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-get-free-robux-2021-on-a-chromebook_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/get-free-stuff-in-roblox_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-get-promocodes-robux-free_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/full-server-hack-roblox_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_off00003a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A68 23024 bytes
SHA-256: 5c6e76f01c13e567663621e4f40de1ca57016c682ac07a88bdd3f9a76544221b
font_01_sfnt_off00006e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E39 19012 bytes
SHA-256: afbbc6672e5e67d3d08182cb82f0154e2527ac7a9675429207b3e1307e5db0cb

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