Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5f693334207dfc0…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 09:23:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cb7ad0bd4efa15aec07817c87cc2f3dc SHA-1: d9487b625e4a74444bb9471d9b63ead2a2aea291 SHA-256: a5f693334207dfc06402bdf284b6c240a2131fbfd2831fbb2d99253c949f879a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting a 'coin master hack'. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves luring users with fake game hacks to a redirector, likely as a precursor to further malicious activity.

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.tw/app/406889139/coin-master-hack-apk-android-game-hack In PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-free-outfit-codes_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-weight-lifting-simulator-3-hack-script_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-spin-pattern_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/download-cheat-and-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-hack-roblox-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/is-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-install-sandbags-777s-eyeball-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-official-page_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/robux-giver_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-free-2021-spin-link_GM406889139.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_off0000307c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307C 23192 bytes
SHA-256: d41dffb67506bc1ace6b8d0ca171673f781aeaf54e86a389bb016dc76f099448
font_01_sfnt_off000064d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D7 18352 bytes
SHA-256: 409485f038817ffbd71fe8cb604f03d96401c5d2dee0684d6cdd4c51b1463fa9

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