Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf85133e36dff60e…

MALICIOUS

PDF

47.3 KB Created: 2021-05-17 20:03:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f30ddcd9a0a54eed4a8d467c360ff290 SHA-1: 2e64b84fb9122be7b54759c29ae071a2b6468a4f SHA-256: cf85133e36dff60e99c6188f27f74a9fa47644572a33b2f0596d77e00b8d28d2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that are designed as lures for game hacks and generators, specifically targeting popular games like Roblox. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of numerous suspicious URLs strongly indicate a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the nature of the lures suggests the links likely lead to malicious websites designed to steal credentials or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/431946152/roblox-sign-in-free-game-hack PDF link annotation
    • http://ines.co.rs/images/robux-converter_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://ines.co.rs/images/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/haktuts-free-spins_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/free-spin-gratis-coin-master_GM406889139.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_off00004921.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4921 27744 bytes
SHA-256: f91e4c7fe3f61ed62bc44fd1c7499659845fb4873b06c645eaf74b6e07e3fdd8
font_01_sfnt_off000089b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B2 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9659 18356 bytes
SHA-256: 0c6b136d59097e1a689858911fb48c20bb16f920676ba78856ab345b09e68bef

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