Malicious PDF — malware analysis report

Static analysis result for SHA-256 7399029e847d817e…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 20:58:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a79f399a890d79f5b41fa929a004bbb7 SHA-1: 7c7b76890d772b5cdaf8fde866c98d3a9571754b SHA-256: 7399029e847d817e9394a192f465a5ed0b1e89d215f54674795b76d42e9f58b6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game currency ('Robux') and directs users to a suspicious URL. The ML classifier strongly indicates maliciousness, and the PDF_GAME_HACK_REDIRECT_LURE heuristic confirms the deceptive nature of the link. No scripts were extracted, but the primary attack vector appears to be a phishing attempt via a malicious attachment.

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/431946152/rbx-land-free-robux-game-hack PDF link annotation
    • http://lib.uho.ac.id/library/repository/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-do-you-earn-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-roblox-interview-center_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-spins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-games-roblox-games_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/wheel-decide-free-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/fb-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-downloads-for-coin-master-daily-rewards_GM406889139.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
font_00_sfnt_off00002e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E99 22604 bytes
SHA-256: b33d1d962d25daaed101335579e2236ce6dd783f440e455d52446c6815e0a337
font_01_sfnt_off000060fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FA 18888 bytes
SHA-256: 4817daf99d7be6acb7e085ade210037e4f4d39e99fb734b610a789fe26adf34b

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