Malicious PDF — malware analysis report

Static analysis result for SHA-256 81d5266bd15eda79…

MALICIOUS

PDF

43.7 KB Created: 2021-05-15 17:34:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9dfba55361d71106fecfa5d818728edd SHA-1: ccf4c4517ffccd7c6781c71c6b4e75689448674b SHA-256: 81d5266bd15eda79234646325f3545129c268f2f855136e75c8245b0a7434075
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free in-game currency or hacks to entice users. It contains multiple embedded URLs, including a primary redirector at `https://netcdn.xyz/app/406889139/offers-to-complete-and-get-free-spins-in-coin-master-game-hack`, which is flagged as malicious. The document body and heuristics indicate a redirection workflow designed to lead users to potentially harmful websites or scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/offers-to-complete-and-get-free-spins-in-coin-master-game-hack In PDF document text
    • http://ims-77.fr/images/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/free-coin-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • http://ims-77.fr/images/coin-master-3rd-village-free-2021-gift-card_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/robux-offer-wall_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • http://ims-77.fr/images/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ims-77.fr/images/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047f4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47F4 23900 bytes
SHA-256: fdb658b3762cccf78c28512e48c20fa73aa242076acd0e0ae767cd95bab8fd5a
font_01_sfnt_off00007df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF4 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000087df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87DF 18396 bytes
SHA-256: a437ba12f7042a0a87041fbc8ef35ebb1425d90343bc1c02dd6b536075df2014

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