Malicious PDF — malware analysis report

Static analysis result for SHA-256 be3c182d3309e248…

MALICIOUS

PDF

30.9 KB Created: 2021-06-19 05:15:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4ee0bb2c6bab899c76179ae7e94cbbba SHA-1: 040909a3f57cb8f772707a73ae1e88916e9297a0 SHA-256: be3c182d3309e248243cafc796893b2e9692e3afe71729fff57255289c42d7c1
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/roblox-lua-admin-script-cheat-engine-game-hack PDF link annotation
    • http://lib.fekon.untad.ac.id/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/tiktok-free-bot_GM835599320.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/minecraft-esp_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-call-roblox-on-pc-for-free_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-look-cool-on-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/cheat-roblox-bubblegum-simulator_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-often-pubg-uc-appointments_GM1330123889.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-daily-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30EC 22888 bytes
SHA-256: 59fc3db6121a8c16ddf22517c0e8b68b9088070e0307c35fb89720cebddc9b83