Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9b87167d5b4217…

MALICIOUS

PDF

36.1 KB Created: 2021-07-06 15:26:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c954aa40f3cd43d31fbcb17f5d2d9706 SHA-1: 347e36db59a808078e2548c5a490d0145e60113a SHA-256: ae9b87167d5b4217ff64d281738b465c90e674b71f0a790be48e39221d1677bf
220 Risk Score

Malware Insights

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

The PDF contains numerous links, including a primary redirector URL, that promise free game currency and hacks. These links are designed to lure users to malicious websites, likely for phishing or malware distribution. The document body and embedded links strongly suggest a social engineering tactic to exploit interest in online games.

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.tw/app/431946152/how-to-get-free-robux-without-email-game-hack In PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/free-roblox-hacks-no-virus_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/free-stuff-on-roblox-ios_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/roblox-cheat-engine-wall-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/free-robux-100-working-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/hack-to-get-shards-in-roblox-shard-seekers_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/dead-by-roblox-bloodpoints-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/how-can-i-get-free-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/how-to-hack-an-acount-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/get-robux-free-for-reel-no-get-someting-free-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/roblox-piece-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/haxteamcf-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/free-robux-hack-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/roblox-hack-peoples-account-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/como-hackear-ropa-en-roblox-de-personas_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/free-tiktok-likes-no-human-verification-or-download_GM835599320.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/course-obstacle-2021-roblox-cheat-code_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/how-to-hack-roblox-accounts-2021-september_GM431946152.pdfIn PDF document text
    • http://pustaka.fkg.unand.ac.id/repository/how-to-have-a-coo-roblox-avatar-for-free_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_off000033ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33EC 22460 bytes
SHA-256: 2be05a5bffba27bcc5189e3a8fa1c67a9ece8f9eaa9791324ca63e5fb920dc1f
font_01_sfnt_off00006602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6602 19800 bytes
SHA-256: 7cc36b060554649fa6389e53221d06b2ae285b8e0623c743bba4dd7e0ab481d9

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