Malicious PDF — malware analysis report

Static analysis result for SHA-256 3947b80625ef174e…

MALICIOUS

PDF

40.7 KB Created: 2021-05-19 17:28:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a9f383380ca4fccddbdd0af400c3e2b8 SHA-1: 5732d4bafc0799afef9c0db7e36da6bf12d8225f SHA-256: 3947b80625ef174e120e1244767274294e70019e6d5cde6a3da627d59c06ece4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting "game hacks" and "free spins" for Coin Master. The ML classifier also flagged this PDF as malicious. The presence of these links and the lure suggest a phishing or scam attempt, likely intended to lead users to a compromised site or download further malware. No scripts were extracted, but the document body and heuristics indicate a clear redirection attempt.

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-extra-spins-game-hack In PDF document text
    • http://j-cook.pro/images/coin-master-free-spin-link-today-download_GM406889139.pdfIn PDF document text
    • http://j-cook.pro/images/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://j-cook.pro/images/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • http://j-cook.pro/images/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://j-cook.pro/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://j-cook.pro/images/roblox-inappropriate-games_GM431946152.pdfIn PDF document text
    • http://j-cook.pro/images/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://j-cook.pro/images/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://j-cook.pro/images/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://j-cook.pro/images/e-free-roblox_GM431946152.pdfIn PDF document text
    • http://j-cook.pro/images/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://j-cook.pro/images/free-apk-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://j-cook.pro/images/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://j-cook.pro/images/roblox-2021_GM431946152.pdfIn PDF document text
    • http://j-cook.pro/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://j-cook.pro/images/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://j-cook.pro/images/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdfIn PDF document text
    • http://j-cook.pro/images/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://j-cook.pro/images/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://j-cook.pro/images/hacking-apps-for-roblox_GM431946152.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000045ac.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45AC 24688 bytes
SHA-256: 96f6e724c091c03aadac9406ade4597fba03939063fb79b98e3b88c6cef0de75
font_01_sfnt_off00007d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D73 17932 bytes
SHA-256: e4978cd717731c86087c350f2d5b7f64f0cbe84d579e2f10df1b5c46c99d20e9

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