Malicious PDF — malware analysis report

Static analysis result for SHA-256 3173500e8677e730…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 03:38:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: dec97c59364cd39363fc61a71d2b90d4 SHA-1: 67dc6027bd209d2347a4461cb113eb2c380374eb SHA-256: 3173500e8677e7309e539a9759e5154d6aeb1e0430ee095b4e97443cfa06fe0c
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/free-robux-easy-and-fast-game-hack PDF link annotation
    • http://autoskola-scp.com/files/how-to-get-free-robux-using-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-come_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/coin-master-tiradas-gratis_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-get-free-robux-on-roblox-online_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-free-bruteforcer_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-make-a-free-shirt-in-roblox-no-bc_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-hack-assasssain-in-roblox_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-phantom-forces-hack-mac_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-pyramids-strucid-beta-free-skin_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-game-made-by-roblox_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/roblox-free-catalog-item_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-robux-boi_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-hack-roblox-no-survey_GM431946152.pdfIn PDF document text
    • http://autoskola-scp.com/files/how-to-create-a-shorts-roblox-free_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_off00002d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D72 22260 bytes
SHA-256: 502234d4195aa44b95c5e3a47aa210b339287afe3d50dc06d8cd7f8f49add335
font_01_sfnt_off00005ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED3 19172 bytes
SHA-256: e478a87f33177f62414f41e8523dd2647ca5964d0e32b68d8766533df2c128b7

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