Malicious PDF — malware analysis report

Static analysis result for SHA-256 65cab5b0cd960f97…

MALICIOUS

PDF

37.1 KB Created: 2021-07-09 00:23:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 57246415a483e3ebaf41e6a91af8e74b SHA-1: ac3c33380a5b72b971deee784c89d3c204bafc9b SHA-256: 65cab5b0cd960f976f008f3adda45c4cedc4c4c842eb32f8eba8df073bec190a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links to known malicious redirectors, specifically advertising game hacks and generators. The ML classifier also flagged this PDF as malicious. The embedded URLs likely lead to further malicious content or phishing pages, aiming to trick users into downloading further malware or divulging sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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 http://netcdn.tw/app/431946152/how-to-robux-game-hack In PDF document text
    • http://cintabaca.org/katalog//repository/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/shiny-teeth-roblox-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-bloxburg-free-money-hack_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-free-shield-link_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/script-hack-2021-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-hacks-no-downloading_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-gang-rape_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-shirts-on-roblox-for-free-no-bc_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/114-hacks_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3ACD 22448 bytes
SHA-256: e0c0b50959e570cd77b223c9c34485960bbb0461748b6cd7263ff252a2eb49ba
font_01_sfnt_off00006cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDA 18716 bytes
SHA-256: 81085473f4b1e3c22888fbcbdc36b36c4cbedeb7fb75c0ceb2fc7ec450597488

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