Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f1f81bfb91cf369…

MALICIOUS

PDF

35.8 KB Created: 2021-06-29 05:31:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d54a35a1a0c90ad8a8c86195354eb30c SHA-1: 11cc63e0d2c3b9e459da5a06186d42f1419a56aa SHA-256: 6f1f81bfb91cf369a94c61eaead6898d13ab3fd27a52a3b930f413885ecd4d44
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and other PDF documents, all masquerading as game hacks or generators. The primary redirector URL is http://netcdn.co/app/431946152/lawn-mowing-simulator-roblox-hack-game-hack, which is known to host malicious content. The document body, though partially corrupted, also contains this URL, reinforcing the lure. No scripts were extracted, but the structure and embedded URLs indicate a phishing or scam attempt to lead users to malicious sites.

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/lawn-mowing-simulator-roblox-hack-game-hack In PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-guest-hack_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-roblox-dnl-injector_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/claim-free-robux-no-human-verification-1-billion_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-item-with-card-purchase-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-best-hack-for-apocalypse-rising-spawn-numbers_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/cheats-that-make-you-get-staff-on-roblox-on-computer_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-synapse-exploit-download-free_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/nuevo-hack-de-robux-2021-funicona_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/money-hack-roblox-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3467 22104 bytes
SHA-256: 755bf6d5c0e82b56466c7b2f5bb97b7fbdec4e2890f9beeae966e75b6ff468d9
font_01_sfnt_off00006553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6553 19640 bytes
SHA-256: 78236b50278668e26bad5f91a19a7c5711fea49445f35a5ba070798ff332c5af

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