Malicious PDF — malware analysis report

Static analysis result for SHA-256 d31694e4d5372039…

MALICIOUS

PDF

35.9 KB Created: 2021-06-25 07:31:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 16b0c6a4d33e78e1f14c33d23aca6e5e SHA-1: 7e782423e584afbabe3d9ca26ff69cc7358f2754 SHA-256: d31694e4d53720397604d8e718a4f9b6541d66a749ef32b915fa580257f43234
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators' for popular games. The primary lure URL is http://netcdn.co/app/431946152/how-to-get-money-on-roblox-with-cheat-engine-game-hack, which is flagged as a malicious redirector. The document body and embedded URLs suggest a phishing or scam attempt to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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-get-money-on-roblox-with-cheat-engine-game-hack In PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-apps-that-actually-work-quick-download_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-bundle-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/arsenal-hacks-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/pubg-uc-rate-in-pakistan_GM1330123889.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-anything-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-vehicle-simulator-money-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/has-roblox-always-been-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/make-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-zombie-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-see-roblox-shirts-for-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-pro-tv_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-coin-master-links-blogger_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3205 22952 bytes
SHA-256: 86f3396c1421140e2739780421e1a545c082f5130a632703c77dd64acaf895d7
font_01_sfnt_off00006591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6591 19616 bytes
SHA-256: f0e7421998e44632f808285a0b3d6f61a001b477262a7f51f8a15befa199c0e3

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