Malicious PDF — malware analysis report

Static analysis result for SHA-256 51c73272f1ed12c3…

MALICIOUS

PDF

34.8 KB Created: 2021-06-28 07:16:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2ff98543672a0151cca12cc2ddf480c8 SHA-1: 55d3c7fa4a547c71fef2281a55821e7ca9037b01 SHA-256: 51c73272f1ed12c3b6c2673fa9aacc21409fcb75d890703deb16746941d08985
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting game hacks and cheats. The document body and heuristics indicate a lure designed to trick users into clicking these links. While no scripts were explicitly extracted, the nature of the links suggests a potential for further malicious activity, such as downloading additional payloads.

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.co/app/431946152/hotshotgamers-roblox-cheat-game-hack In PDF document text
    • https://library.uigm.ac.id/repository/roblox-hockey-mask-free_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/cant-hacking-to-pokes-acount-in-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/claim-gg-earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-omg_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-roblox-promo-codes-july-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-super-power-training-simulator-token-hack_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-how-to-sell-items-for-free_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-make-roblox-tool-script-hack_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-speed-up-jg-productions-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/cheat-roblox-jailbreak-installer_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-exploit-hack-november-2021_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_off0000318a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x318A 22276 bytes
SHA-256: 9bceedf96f0c96a33d2115edb07660e66ef4a697214c5e1914676641673b9ce0
font_01_sfnt_off000062f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F0 19016 bytes
SHA-256: dde1cecad608abc297c371ea99ccf5a9111d937d78ddd4155d0d5ed0bc498557

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