Malicious PDF — malware analysis report

Static analysis result for SHA-256 4074da21948b530d…

MALICIOUS

PDF

34.2 KB Created: 2021-07-08 15:28:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 381c86ea0db61754824611576e028451 SHA-1: 51bfdf9f2ce7c323d52380264ebfce83a7316c26 SHA-256: 4074da21948b530d8662dfeda527cbc1e9810bae776591511362f63efd2a26c6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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.tw/app/431946152/freerobux-co-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-roblox-using-cheat-engine-67_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-roblox-for-robux-no-details_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/wix-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-live-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-into-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-how-to-get-synapse-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-o-use-cheat-engine-in-roblox-tycoon_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-wipeout-beta-hack_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_off0000305f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x305F 22164 bytes
SHA-256: 4fe7535ee1ecddb62e4082007f0fbf88c0a25fdb33281cab0ec8fdf033229366
font_01_sfnt_off00006195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6195 18716 bytes
SHA-256: b436464f6dc3f91ee9d394fa71dc77356e240180086c0e2ba055b597967e29bd

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