Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3f6e73963af4a21…

MALICIOUS

PDF

47.0 KB Created: 2021-05-12 08:46:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b3fddbc86a3fe738936dca14cff88040 SHA-1: bf7dbc1ed67705cbafa0d290393a465fa9f0eec8 SHA-256: c3f6e73963af4a21ec6b22ce2e80c136676499ae4f406b63b79972ee360d671c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically advertising "free generators" for games. The ML classifier also flagged the document as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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-coins-and-spins-daily-game-hack In PDF document text
    • http://mycookingpot.com/images/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://mycookingpot.com/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://mycookingpot.com/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/wurst-115_GM479516143.pdfIn PDF document text
    • http://mycookingpot.com/images/roblox-army-robux_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • http://mycookingpot.com/images/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://mycookingpot.com/images/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://mycookingpot.com/images/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://mycookingpot.com/images/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • http://mycookingpot.com/images/how-to-get-free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mycookingpot.com/images/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://mycookingpot.com/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://mycookingpot.com/images/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://mycookingpot.com/images/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://mycookingpot.com/images/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004f5e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F5E 25596 bytes
SHA-256: 190ebccb248f4ea80d51926b78912aae4ddcda136901a9c91147657e2c13665d
font_01_sfnt_off000089c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89C8 3204 bytes
SHA-256: 8c2546387700f45186c395d475006178ee984eabbc175bcf1ee6eb58ba8b57aa
font_02_sfnt_off000094cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94CC 18480 bytes
SHA-256: afe33923ca989cd5d8a4fb240de59bbfcccaf1928071fdd0e6e63d3de042dc3b

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