Malicious PDF — malware analysis report

Static analysis result for SHA-256 040bfb7643cb28ea…

MALICIOUS

PDF

48.1 KB Created: 2021-06-08 23:21:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 04b635921517adc0f5493aadafe1ebd2 SHA-1: 18eb57e60743be78c72f4d063937866b7be3b96d SHA-256: 040bfb7643cb28ea82e0bbb2aaca18a14173f289aa17e1aab5e4d78cdc07e2fd
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 0.9871

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.tw/app/431946152/hackear-cuenta-de-roblox-2021-pastebin-game-hack PDF link annotation
    • http://glll.de/images/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://glll.de/images/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://glll.de/images/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://glll.de/images/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • http://glll.de/images/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • http://glll.de/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://glll.de/images/robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://glll.de/images/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://glll.de/images/hack-robux_GM431946152.pdfIn PDF document text
    • http://glll.de/images/robux-free-co_GM431946152.pdfIn PDF document text
    • http://glll.de/images/free-coins_GM406889139.pdfIn PDF document text
    • http://glll.de/images/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • http://glll.de/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://glll.de/images/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://glll.de/images/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://glll.de/images/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • http://glll.de/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://glll.de/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://glll.de/images/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • http://glll.de/images/how-do-i-get-free-spins-on-coin-master_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
stream_004_off00004f98.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F98 30056 bytes
SHA-256: ca85dbe9df88b01f47a3061fca75bda8ad097588dcf1a99ceadf5c2e3dea444f
font_01_sfnt_off00009673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9673 19272 bytes
SHA-256: 13f5830265e9de5669d514c1d1412fbc48bc1f905746efdf1e14e7a593c87af2

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