Malicious PDF — malware analysis report

Static analysis result for SHA-256 178bd739040a23a8…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 15:20:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 20bf266f75c874ff84d143d3b21ae749 SHA-1: 64be2a7a83a8cf0d3bce0f576a5b49c73cd8e2b1 SHA-256: 178bd739040a23a8db76ec705f320b956ccc0399c41e9ce0c56723c2131f411f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of game hacks and free currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn hosts numerous other PDF files with similar deceptive content. The ML classifier strongly indicates maliciousness, and the presence of multiple redirector links confirms a malicious workflow.

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.tw/app/406889139/hack-my-game-xyz-coin-master-game-hack In PDF document text
    • http://slim.sisminkada.net/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-hack-lumber-tycoon-2-script-inserter_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/comment-activer-cheat-code-roblox_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/counter-roblox-hack-aimbot-2021_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/comment-hacke-roblox-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-hackers-list_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/hightlighter-player-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/robux-club-hack_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-free-robux-legitimately_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/elemental-battlegrounds-roblox-hack_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/css-roblox-injector-hack_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-app_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
stream_002_off00002f98.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F98 22848 bytes
SHA-256: cb3b445079ca924c9a7d077234e2ec5ddad1fee30084100ddd85ce894c7d7168
font_01_sfnt_off000062d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D8 18752 bytes
SHA-256: 33b0ae4fa0c3e15354cdf46e051c8113c77c51e768fec96c29798f0c17eafa1d

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