Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4386966bc7b5b66…

MALICIOUS

PDF

41.6 KB Created: 2021-05-19 06:46:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 42d3a24955be39c28cb1c9738e400f90 SHA-1: 7fc3689df4f532ced3f7237942ba8ba988cede6c SHA-256: f4386966bc7b5b66bec89518ec38c105b282b269d3971d6530f76feb6f1d1166
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic firing for a 'free generator / game hack' lure, directing users to a suspicious URL. The document body and embedded links reinforce this lure, suggesting the primary goal is to redirect users to potentially malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/835599320/what-tiktok-free-followers-game-hack PDF link annotation
    • http://iricamidelcuore.it/images/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://iricamidelcuore.it/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://iricamidelcuore.it/images/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • http://iricamidelcuore.it/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://iricamidelcuore.it/images/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://iricamidelcuore.it/images/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://iricamidelcuore.it/images/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://iricamidelcuore.it/images/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://iricamidelcuore.it/images/coin-master-online-hack-2021_GM406889139.pdfIn PDF document text
    • http://iricamidelcuore.it/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://iricamidelcuore.it/images/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://iricamidelcuore.it/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://iricamidelcuore.it/images/rbx-robux_GM431946152.pdfIn PDF document text
    • http://iricamidelcuore.it/images/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://iricamidelcuore.it/images/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
    • http://iricamidelcuore.it/images/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://iricamidelcuore.it/images/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • http://iricamidelcuore.it/images/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://iricamidelcuore.it/images/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://iricamidelcuore.it/images/synapse-roblox-free-download_GM431946152.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
stream_003_off000047e8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47E8 24620 bytes
SHA-256: 38fc5bfc1cb0564804e45ff9243767a900b344c53a4828a4eabd0cb0cf4251c2
font_01_sfnt_off0000802f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x802F 18288 bytes
SHA-256: a1eab4d3649b98c06256ee0ef9038be6a7cdae257531efa4763af022994082e9

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