Malicious PDF — malware analysis report

Static analysis result for SHA-256 c67ee590df29f1d6…

MALICIOUS

PDF

43.5 KB Created: 2021-05-19 09:40:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b96bcf4da803f21fafdb3d32a46a4f95 SHA-1: e5ffab2a7a7ee9c7fe9295ed7e3a4c8e9c6f99a4 SHA-256: c67ee590df29f1d622b5cccaffa98cd46fb4957c0af00641bee4c7104ea01138
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links, including one identified as a 'free generator / game hack' redirector, suggesting a social engineering lure. The document body, though partially corrupted, contains text related to game hacks and free spins, reinforcing the lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate an attempt to redirect the user to potentially malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/fb-coin-master-free-spins-link-game-hack PDF link annotation
    • http://sbm-nn.ru/images/unlimited-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-devil_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-please_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/pubg-uc-buy-in-pakistan_GM1330123889.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-food_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-without-survey_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_off000046ba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46BA 24164 bytes
SHA-256: 268e05a218c94b912fb9de8ffc14677bc2cfb0cf31155438981307c0146f655c
font_01_sfnt_off00007db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB7 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8768 18212 bytes
SHA-256: a228781abc07904b27a451649b4cbec605bc7d07320168c20386cc2d173a67dc

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