Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c7e22f98a43397c…

MALICIOUS

PDF

45.3 KB Created: 2021-06-09 11:43:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 40a43ed037e7b1f80d33a4c6db84a986 SHA-1: 6fb5c74bb8e93aa3d99ba7f7813e11b3fc5f50e7 SHA-256: 3c7e22f98a43397c65c383ed11adc83e1a2a033ecffe9a298ddd91ba3675dd72
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to a known malicious redirector infrastructure, designed to lure users into downloading a 'game hack'. The presence of embedded URLs and the nature of the lure suggest an attempt to deliver a secondary payload. The document body, though partially corrupted, contains text related to 'Robux And Tix Hack 2021' and includes URLs that appear to be part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/robux-and-tix-hack-2021-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/more-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-hack-weg-machen_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/tiktok-for-free-download_GM835599320.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/cute-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/pastebin-roblox-free-obc_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-hack-roblox-accounts-2021-easy_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_off00004e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E7C 27952 bytes
SHA-256: ad438c4108b7413a5741d74e9094492064f9a86a40f1ab1c9fe499325d9aaed7
font_01_sfnt_off00008c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C21 18944 bytes
SHA-256: 9dd210d2e9267d1d5d233fa539292dc089c8ce4911563e91a2f71c8c4e49235a

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