Malicious PDF — malware analysis report

Static analysis result for SHA-256 234d2668d3812d26…

MALICIOUS

PDF

34.9 KB Created: 2021-07-08 05:55:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 040ca65ddc0ec4c959c152f01085f151 SHA-1: 17857dbc1167e87118fc43e1e606595303d07d6c SHA-256: 234d2668d3812d2668440692a9c190ac66abad6048ec2b20054e80367f7b7a57
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The heuristic firings indicate the document is designed as a lure to a known malicious redirector. While no scripts were explicitly extracted, the nature of the embedded links and the ML classifier output strongly suggest a malicious intent to redirect users to potentially harmful content or further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/406889139/coin-master-hack-root-game-hack In PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/playing-free-robux-games_GM431946152.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/coin-master-free-spins-generator-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/roblox-rise-of-nations-cheat_GM431946152.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/noob-vs-pro-vs-hacker-vs-god-roblox-bloxburg_GM431946152.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/scriptware-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/free-robux-generator-2021-nov_GM431946152.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/get-free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/how-to-legit-hack-into-somebodies-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/free-face-roblox-girl_GM431946152.pdfIn PDF document text
    • https://www.tvoyo.tv/ckfinder/userfiles/files/robux-miner_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_off00003240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3240 23264 bytes
SHA-256: 5cb122c340953989c63cf988153fcbc52119dde19b0c6a7eb587d07ef19e0c63
font_01_sfnt_off000066b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B3 18004 bytes
SHA-256: 88965cff14ae3d44805207439b4eea4fe5e6421e4cbbb00d66f0cdd29756971c

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