Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7a1358491b92e20…

MALICIOUS

PDF

35.8 KB Created: 2021-06-19 04:33:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: af382eb1ff7ebfe9fc45d9c067a79539 SHA-1: 44f97476ed2af6d387a453f127680b82bd2417a0 SHA-256: a7a1358491b92e20476b75161aa07ce0ec75f57ba0925db134b58e511e50a415
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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.co/app/431946152/robux-hack-tool-download-2021-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-easy-fast_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-blogspot-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-transparent-shirt-template-free-shipping_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-free-skin_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/i-will-hack-and-not-kill-parent-roblox-group_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-arcane-adventures-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-do-you-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-spin-hack-trick_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_off000032a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32A4 22624 bytes
SHA-256: cd78a759a485183aecca71305a3363efd1d2bb7a889d69bb93cae5a573c74258
font_01_sfnt_off000064e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E6 19704 bytes
SHA-256: faec3a6ffa277b1df4df0a9521f24f88081229b57d5edea5d553667fe108f699

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