Malicious PDF — malware analysis report

Static analysis result for SHA-256 a34b75a64199d65b…

MALICIOUS

PDF

37.8 KB Created: 2021-06-25 15:44:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f4cea627090677ed7d7339f524aa83ec SHA-1: a1a6da1935c62ceb78faa72ef3ab7ff2ccd9a7d2 SHA-256: a34b75a64199d65bfd0f24472b0a15e645faa42c095f9133703794469cb521d0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links to external websites that promise game hacks and free items, a common lure for malicious content. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' specifically flags this behavior. The ML classifier also strongly indicated maliciousness. The document's content and linked URLs suggest an attempt to trick users into downloading further malware or engaging in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://netcdn.co/app/431946152/how-to-get-any-gear-free-on-roblox-game-hack PDF link annotation
    • http://niceviaapia.com.br/images/ckfinder/files/if-roblox-got-hacked_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/use-cheat-engine-with-roblox_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-hack-deutsch-pc-2021_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-get-free-robux-sign-up_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-make-a-skin-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-sex-cheat-code_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-vehicle-simulator-hack-download_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/client-minecraft_GM479516143.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/pet-simulator-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-get-free-robux-copy-and-paste_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://niceviaapia.com.br/images/ckfinder/files/cute-free-stuff-on-roblox_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
font_00_sfnt_off00003b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B7C 22732 bytes
SHA-256: 63231a38cb39ccc4405affe2fc04125938fe2ff6f9a5c9a1990d2c1422668401
font_01_sfnt_off00006e91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E91 19096 bytes
SHA-256: de39d90a14a7b989cc05a04cb712d11b34c8de9ce50727b3f9d60b2611af495f