Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a9f09f758e0b1f0…

MALICIOUS

PDF

35.1 KB Created: 2021-06-30 06:09:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3f5a752039090b2851ce68b307da4254 SHA-1: de5eb0f7b515ce0ae2e2c7e2194e8d08ea27cbe6 SHA-256: 6a9f09f758e0b1f054066fca5f8e069e64008f1911b8b81d7bdcf3a15b3ed84a
160 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs that lead to a known malicious redirector infrastructure, specifically advertising free game hacks and currency. The ML classifier strongly indicated maliciousness, and the document body text reinforces the lure of free in-game items. The primary URL, http://netcdn.co/app/431946152/free-robux-wheel-spin-game-hack, is the most direct indicator of the malicious redirection chain.

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/free-robux-wheel-spin-game-hack In PDF document text
    • http://perpus.i2s-learning.com/repository/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-gear-from-games-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-do-you-get-free-robux-on-a-phone_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/tiktok-free-unlimited-likes_GM835599320.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/como-generar-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/tycoon-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-roblox-multiple-game-openers_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-roblox-noob_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/hack-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/robux-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/bleu-free-download-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/new-op-roblox-assassin-aimbot-script-free_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-no-human-verification-ios_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-rs-cheat_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_off00002dfc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DFC 23444 bytes
SHA-256: 251a1373bebf3696318ff47d34983fc61cd604f778d436150147c03b41eba6e6
font_01_sfnt_off00006316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6316 19448 bytes
SHA-256: 0a8760edf6f9ea2eef8bfc6f60d130c9076ba5ab68b36072a8d5a6a29bbaf2d0

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