Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4ad24e6bde679a4…

MALICIOUS

PDF

34.3 KB Created: 2021-06-30 09:40:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 931f85edb1be5b308837d10440ac645e SHA-1: 30e68e4559980d3c960827d98be312a6b40c9f79 SHA-256: d4ad24e6bde679a4ee4206a1990bab74a14c184b739a944866eee6172acd31d7
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one to a known malicious redirector, disguised as game hacks and generators for popular games like Roblox and Coin Master. The document body and heuristics indicate a lure to click these links, which likely leads to phishing sites or further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.co/app/431946152/roblox-funny-hacking-game-hack In PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/money-hack-sur-sunset-city-roblox-2021_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/roblox-dragon-ball-z-final-stand-hack-script_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/coin-master-hack-tool-pc_GM406889139.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/earnrobux_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/free-robux-and-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/roblox-free-robuxapl_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/mobile4free24-free-robux_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan/repository/free-punch-animation-roblox_GM431946152.pdfIn PDF document text
    • http://labfisika.undiksha.ac.id/perpustakaan//repository/coin-master-free-spins-2021-app-download_GM406889139.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_off00002f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F88 22012 bytes
SHA-256: f8e2dd0b880ef221bcf9d86f0b66f1ce8209de34ede75493524f51ff453597a5
font_01_sfnt_off00006079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6079 19260 bytes
SHA-256: b2459b58b9421c1dcb7e6cd7b8eedd7597e7649d9a7731f4c6b87c66bf4ea6a6

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