Malicious PDF — malware analysis report

Static analysis result for SHA-256 99012e952ef78944…

MALICIOUS

PDF

33.0 KB Created: 2021-06-25 04:51:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 78b770d3c0cea92c9c48a7f021161861 SHA-1: ec66fef15b7db31b0eb062a50eee143ec9833a77 SHA-256: 99012e952ef789449d3ecc8f26de60746bec8f6f9f07cc1efa3072e64b36d57d
82 Risk Score

Malware Insights

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

The PDF document contains a lure for free game items, specifically referencing Roblox and Coin Master, directing users to a malicious URL. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' confirms this, and the ML classifier strongly indicates maliciousness. The embedded URLs are likely used to download a second-stage payload or redirect to a phishing site.

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/cool-free-roblox-items-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-face-robloxcom_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/link-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-how-to-get-a-free-dominus_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-free-wings_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-and-bc-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/robux-website-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-imagine_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-70-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/tiktok-free-music_GM835599320.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/mcpe-optifine_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spons-apk-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/robloxcom-free-robux-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_off00002ce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE5 21544 bytes
SHA-256: b72d567a8098d75220597ba002fe47394e336af71248488a010a487e9bb0ce36
font_01_sfnt_off00005c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C0E 19016 bytes
SHA-256: 989bc3ecdde0be1900d2c536ed567ac53d537fd2e638cb9cd84a1373dd6d4d17

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