Malicious PDF — malware analysis report

Static analysis result for SHA-256 53c49cb2314b4d3e…

MALICIOUS

PDF

34.3 KB Created: 2021-06-26 01:53:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f00cf1449ca2f782047dbf3ef8528bdf SHA-1: 63b0be2a1821aff60ad8cd203105626bfc99924a SHA-256: 53c49cb2314b4d3e31602913945f7c4ff84e343ff845ac893177be2969fc732c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous embedded URLs, many of which are structured as SEO link farms pointing to game cheats and hacks. The ML classifier strongly indicates maliciousness, and the presence of a download button lure reinforces the deceptive nature of the document. The primary goal appears to be directing users to external sites that likely host malware or facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/finally-roblox-free-gifts-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id//repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spins-link-2021-blogger_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-free-not-to-download_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-roblox-no-sign-up_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-struid-battle-royale-aimbot-hack-full-lua_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-pc-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/fashion-frenzy-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-roblox-2021-script_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/escape-room-by-devultra-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/pseint-exist-hack-roblox-lvl-6_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-a-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/robux-hack-pastebincom-raw_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-daily-rewards-link_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_off00002f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5F 22548 bytes
SHA-256: 119e94e5cb8f4644925b0336b60260105ca829a1a01558c347081a61cc2da4d5
font_01_sfnt_off00006101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6101 19052 bytes
SHA-256: edb5d4dfaa081dab46f4abdaafa49a958152d92b80756620984b4bed2765bf01

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