Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ecb9ac01eb353ba…

MALICIOUS

PDF

40.4 KB Created: 2021-05-15 16:31:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 232cafdba5d81066a9548058debc025e SHA-1: d6578640ca97f5d4dbdda61dbac21d5b85f64ced SHA-256: 8ecb9ac01eb353ba075fd1b21242874b232e1137591515d4cf99a7f9d1fa7b27
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, leading to a "coin master free account game hack" lure. The document body and embedded links suggest a social engineering tactic to trick users into visiting potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-free-account-game-hack In PDF document text
    • http://sfsbm.org/images/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://sfsbm.org/images/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://sfsbm.org/images/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://sfsbm.org/images/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://sfsbm.org/images/coin-master-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://sfsbm.org/images/coin-master-free-spins--coins-2021_GM406889139.pdfIn PDF document text
    • http://sfsbm.org/images/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • http://sfsbm.org/images/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://sfsbm.org/images/earn-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://sfsbm.org/images/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://sfsbm.org/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://sfsbm.org/images/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • http://sfsbm.org/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://sfsbm.org/images/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://sfsbm.org/images/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://sfsbm.org/images/robux-come_GM431946152.pdfIn PDF document text
    • http://sfsbm.org/images/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://sfsbm.org/images/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • http://sfsbm.org/images/coin-master-hack-pro-gamers_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
stream_003_off000044fb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x44FB 24764 bytes
SHA-256: 4bb120f34db241eead09f5355b31c25d64fe0cb45828027223549364949935a4
font_01_sfnt_off00007cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDC 17848 bytes
SHA-256: 81db58af0d0a7c54bfcbf00b0a30aba5f5662412ae545e00ecca40055587a372

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