Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1d246e60602e00…

MALICIOUS

PDF

35.0 KB Created: 2021-06-30 15:36:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e191366e1ea5e98ba2b5a42dbb54e0aa SHA-1: 9abe20532fc69589c5a339f479a8004973af6c11 SHA-256: 0a1d246e60602e00bb2d5a81ae8213f4961ff6c0c3e1cee94379b6280475a0c5
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free in-game currency to trick users into clicking malicious links. It contains numerous links to redirectors and SEO link farms, indicating a phishing or scam campaign. The document's structure and embedded links suggest it is designed to lead users to potentially harmful websites.

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/how-to-hack-roblox-account-february-game-hack In PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/free-robux-no-survey-no-download-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/como-conseguir-diamonds-en-royale-high-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-dino-simulator-kaiju-skins-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/get-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-robux-hacks-com-online_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/how-to-get-free-robux-with-copy-and-paste_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/free-robux-codes-inspect-element_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/how-to-get-2021-robux-for-free-proof_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-blox-piece-script-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/free-gamepasses-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/noclip-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/cheat-roblox-tower-defense_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/free-robux-converter_GM431946152.pdfIn PDF document text
    • http://pustaka.fkm.unand.ac.id/repository/roblox-hack-tool-for-robux_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
stream_002_off00003111.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3111 22416 bytes
SHA-256: af8fd94821fcd5997fb7d98023086849ce32e1c4a9c30a5b34ab740be63501b5
font_01_sfnt_off000062b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B6 19408 bytes
SHA-256: f2f93b2523b37f99372da0e4823f68f8fe994a6a8195c2cf8576f412e0f193b4

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