Malicious PDF — malware analysis report

Static analysis result for SHA-256 85d582a0c522ff0b…

MALICIOUS

PDF

35.1 KB Created: 2021-06-29 06:18:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 143ec3b3b3465588781282ab761d1f44 SHA-1: 06e01fefbf2ed3fe66da473d2e3fb86e2b4e5763 SHA-256: 85d582a0c522ff0b6ba887af415003ec215e1fac08b036b8228bb16ff77a11aa
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.co/app/431946152/how-to-get-free-robux-no-verifaction-or-servey-game-hack PDF link annotation
    • https://c2o-library.net/catalog/repository/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-hack-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-use-impact-remastered-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-gang-rape_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/argent-infinie-lumber-tycoon-cheat-roblox-engine_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-granny-hack-money_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/animation-pack-roblox-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/jailbreak-beta-roblox-hack-dll_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/ways-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-wins-hack-boxing-simulator-2_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-easy-verification_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-roblox-games_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_off0000311f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x311F 22612 bytes
SHA-256: 1ac496e390aca0ef877e4e280eb213aa8b3aa5a224758e576c8cad4759cac5a4
font_01_sfnt_off0000629c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629C 19532 bytes
SHA-256: 255abe27e8e83091e81f0251b30372760a4d8fa73dce9760998aca91dbb38deb

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