Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37a29e29d2dc632…

MALICIOUS

PDF

38.3 KB Created: 2021-07-04 11:01:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cb42730e73e06f1316a75ff2b8756cd7 SHA-1: 32409512a4028eb512ca39c493a26cdb89b7faab SHA-256: b37a29e29d2dc6323982ca7991694735398396309d3ae826507d364b9d208b82
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 0.9886

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/how-to-hack-coin-master-game-hack PDF link annotation
    • https://nutrafeliz.cl/ckfinder/userfiles/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/how-get-free-skin-in-cs-go-roblox_GM431946152.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/free-printable-roblox-birthday_GM431946152.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/how-to-get-free-robux-easy-on-pc_GM431946152.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/roblox-com-hack_GM431946152.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/coin-master-village-4_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/cheat-on-roblox-ghost_GM431946152.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/2021-roblox-hacking_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000346f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x346F 23288 bytes
SHA-256: 007c74c5a5a27cd98dc0d91e0583cc4fa43a46865effe988028091a30ba787cf
font_01_sfnt_off0000691c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x691C 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00007301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7301 18168 bytes
SHA-256: 2bd458773159c42ddb973016f08b2d4d6bea9039625adade8827a8f393a5a95a

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