Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa12a4d9b07fd51d…

MALICIOUS

PDF

42.6 KB Created: 2021-05-13 16:08:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 11cb13552c38011d2ad51b8297a2d567 SHA-1: a48b2c3453be9c8f9443bc74907cc61d99fb8da5 SHA-256: fa12a4d9b07fd51db1f02ea093f202d99b117f3ce065ff8791bd27cac7af7c1c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free resources. The document body and embedded URLs strongly suggest a lure to download potentially unwanted or malicious software. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection and a lure for game-related exploits.

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-mod-version-free-download-ios-game-hack In PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-robux-app_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/rbx-robux_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/roblox-sexually_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/ww-robux_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-hack_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_off00004b5a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B5A 24892 bytes
SHA-256: 02fe19df63fa44d6fc365d6dbc33ca1e25dca24a7e49271b4ff8b6ff254a037d
font_01_sfnt_off00008396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8396 18424 bytes
SHA-256: e21c1a46e414e08f32ecd5b141a565b40ef5ebf0a551a42677bec20a6ad54cab

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