Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b8ae7422968bc48…

MALICIOUS

PDF

32.2 KB Created: 2021-07-04 13:34:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3e547934ff2769b9acd4499c9123f4b9 SHA-1: facaf379d49154692d792058af83918b2ae4b0a4 SHA-256: 7b8ae7422968bc484f01c3af8976fb8d1b5ee487900f39f4a4ea0ed35443bf84
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a prominent link disguised as a game hack or generator for popular games like Roblox. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the embedded URL strongly suggest a social engineering tactic to redirect users to a malicious site. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the primary attack vector appears to be a lure to a potentially malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.tw/app/431946152/roblox-free-wings-game-hack PDF link annotation
    • https://www.cow-style.com.tw/upload/files/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/script-for-steves-one-piece-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-robux-bis_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/how-to-hack-roblox-to-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/coin-master-hack-root_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/infinite-health-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-tiktok-accounts-with-followers_GM835599320.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-tix-factory-tycoon-packet-tix-hack_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_off00002a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A59 21348 bytes
SHA-256: 07d2e0f6db80f206ed0e7b305613e992589de668fda242a5d81cff506acdcfff
font_01_sfnt_off00005910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5910 18968 bytes
SHA-256: d91fe945418f85379dec2f7be6f1e2f87923cf86a97dd98021675ad5a3e5229b

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