Malicious PDF — malware analysis report

Static analysis result for SHA-256 57bb0cbb9b77ad8a…

MALICIOUS

PDF

43.2 KB Created: 2021-06-03 05:58:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5045ed0db2c2ddd64ccf11d288c97e41 SHA-1: a97bb497090d4ac7956d6b79afa6e12fef111d0f SHA-256: 57bb0cbb9b77ad8a3bb2979e012e30f59c3e87de767922fab1b489944e2f07a7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a game hack lure. The document body and embedded URLs promote 'free spins and coins' for games like Coin Master and Robux generators, directing users to external sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest a malicious intent to redirect users to potentially malicious or scam websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/free-spins-and-coins-coin-master-facebook-game-hack PDF link annotation
    • http://ghi.dk/billeder/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-daily-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/roblox-free-hats_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/roblox-avatar-girl_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/legit-coin-master-hack-october-2021_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/robux-free-c_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/free-robux-accounts_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_004_off00004dcd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DCD 24300 bytes
SHA-256: b1f1196e185e56e04ea5928f24f40681b218fea75e9a8b5e141b435be9e5172f
font_01_sfnt_off000085be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85BE 18388 bytes
SHA-256: c259822e3b8381453156a43a7e816a9acef9d9e845b894db8a1ad224a94bdcc2

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