Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a4fc8c7533bd328…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 13:55:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 08a5a797f551663481d98cd2127eaa98 SHA-1: ef89644893404df61d76c43c00daf39d94405751 SHA-256: 8a4fc8c7533bd3283697d44c2124bbed777fe14fd9f8ecaf940ecd67518599ae
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a malicious domain, likely to trick users into downloading malware or visiting phishing sites. The document body and heuristics indicate a lure related to game hacks and free currency, a common social engineering tactic. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/free-robux-glitch-game-hack In PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-money-hack_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_004_off0000518e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x518E 26764 bytes
SHA-256: ce2802deb32b6a9714931c3db4570fd0a4b169c4e4b83e38b2c412f5ed4c20ce
font_01_sfnt_off00008d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D35 18476 bytes
SHA-256: f765832fecc9da479c67465a8abf2ce33ee435527d5ee59b7236f6265686440b

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