Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d4431979fdef946…

MALICIOUS

PDF

42.4 KB Created: 2021-05-16 08:08:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f73acf5d497d8b8627db25b90610a139 SHA-1: c033f05aa4c4baa473037e0af53e61e5beb3dadd SHA-256: 7d4431979fdef94631be36eddc5d96973de073e29e2218d7e3b73d021972689b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-official-fan-page-game-hack PDF link annotation
    • http://fobh.net/userfiles/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-tips_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-to-get-minecraft-for-free-2021_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-hacks-to-get-spins_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/roblox-hack_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-link_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/optifine-mcpe_GM479516143.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_off000049ca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49CA 25416 bytes
SHA-256: 2c5490163ca01202d680d7789ac7f79a2e8fbcf20eb5cf2868b9b3f0d21393fa
font_01_sfnt_off000083c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C5 18224 bytes
SHA-256: 7172d272c2564e6620d13bdfead72d9093949332c318f086f8b2c295f81971a9

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