Malicious PDF — malware analysis report

Static analysis result for SHA-256 139206a001864548…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 09:40:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 471b158018b77a819452161ba239ac2b SHA-1: 1e0c0bd1d828cba6d2f4d92c24a3f0aff2807702 SHA-256: 139206a00186454848a617dffbd402bde5e2052bcbcddc20432818d48e18dc2a
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/card-hack-in-coin-master-game-hack PDF link annotation
    • http://library.forda-mof.org/katalog/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/cheat-roblox-aimbot_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/multiple-roblox-download-free_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/tiktok-free-mockup_GM835599320.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/one-hit-roblox-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/programa-para-ser-hacker-en-roblox_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_002_off000030fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30FA 23032 bytes
SHA-256: 446865a3deb459e7204f4c9c391fb58282d1a8bf2c3dec8fc320b1da26a2680b
font_01_sfnt_off000064c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C2 18180 bytes
SHA-256: 610c98fbefd1f098a8e1eea02af770c3786bc8d2862495ec77f525b61ab0d19b

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