Malicious PDF — malware analysis report

Static analysis result for SHA-256 41a716750d9b2de7…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 19:49:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f513d1dc7c80d635675adab3497b2884 SHA-1: 6b2050a26cfa43d93e5a9fdb521f5fe1d8ded3aa SHA-256: 41a716750d9b2de728363464b8a9b2bb0ef6afc790b9f88b6833ec74a80df0e6
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-spins-cheat-game-hack PDF link annotation
    • http://chem.ipb.ac.id/kim/repository/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/minecraft-116-free_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-inappropriate-games_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-hack-coin-master-game-ios_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/can-you-get-banned-for-using-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/exploit-free-roblox-not-win-rar_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/cheats-coin-master-free-spins-and-news_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-apk-mod-free-download_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F25 22616 bytes
SHA-256: fd2c39dd34fa9906c4f9bebeeb61036f9388d0999dbb444d97b33a10615e648e
font_01_sfnt_off0000616f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x616F 18340 bytes
SHA-256: 31b040f11d31e2c25a3918167828aea55bdad87c8eae0a9348126ed232a1d2b9

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