Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a83fd799d330f61…

MALICIOUS

PDF

45.9 KB Created: 2021-05-13 19:43:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: eb2626a28cff35e24fa86839d02ddd3b SHA-1: 1214e5732b81ceacd3df641d26518ea75e7542e3 SHA-256: 8a83fd799d330f6190c1ef2f9512d0e6292c5fea462b5b75fa36ceb6436fe643
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks, directing users to a malicious URL. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to a potentially harmful site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/406889139/free-spin-coin-master-ios-game-hack PDF link annotation
    • http://bpbfloydinc.org/images/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • http://bpbfloydinc.org/images/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • http://bpbfloydinc.org/images/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://bpbfloydinc.org/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/login-robux_GM431946152.pdfIn PDF document text
    • http://bpbfloydinc.org/images/free-links-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bpbfloydinc.org/images/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://bpbfloydinc.org/images/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://bpbfloydinc.org/images/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bpbfloydinc.org/images/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://bpbfloydinc.org/images/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://bpbfloydinc.org/images/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://bpbfloydinc.org/images/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://bpbfloydinc.org/images/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004758.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4758 27712 bytes
SHA-256: cff81f43c621e50e4c31d3fb6ee9ce3d9e58c6709a4b5d764e3224c5a37e47ea
font_01_sfnt_off000087c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87C7 3000 bytes
SHA-256: 56ee3cf210babcab1d595ec3cc7d666f7a646b8ea00ab1e6563ebd84f84582f8
font_02_sfnt_off00009226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9226 17884 bytes
SHA-256: 5eb2d7dbb743594663af058a86b176e9f3c663ad368d873d72479ee79bf44ad7

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