Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ac82f2255a3d937…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 13:57:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2b06b208cbe62e59a7494858c87d624a SHA-1: 16d55d6dc42dd304cad9e24c2369609631ead548 SHA-256: 5ac82f2255a3d93736116966a472ce6c809087d2c6479bdd74321dbf176c4ec2
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 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-coins-link-2021-today-game-hack PDF link annotation
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/pokemon-brick-bronze-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/free-one-piece-roblox-character_GM431946152.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/hack-tiktok-fans-free_GM835599320.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/roblox-free-body_GM431946152.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/roblox-super-power-training-simulator-free-vip-server-no-pvp_GM431946152.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/2021-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/how-do-you-get-robux-for-free-roblox-youtube_GM431946152.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/get-free-robux-pastebincom_GM431946152.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/rbl-gg-free-robux_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_002_off000033b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33B7 22164 bytes
SHA-256: f145f3ec3ac078ed0c26b2a87ef49b0d1f561f7621195118993807d0d64b72dd
font_01_sfnt_off000064fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FB 18924 bytes
SHA-256: 9de0cd144d01747faee9598eb41490a3121b78bc3e8aa19ce2f97cd77f13f1f7

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