Malicious PDF — malware analysis report

Static analysis result for SHA-256 07bfcc01704eaa1c…

MALICIOUS

PDF

41.5 KB Created: 2021-04-22 16:32:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b98ae984820e4f2801648e0c77c9e8bb SHA-1: dcb5422fada620afe9a5b88f8b354c5e72a88ef2 SHA-256: 07bfcc01704eaa1c241ae0ab6d049816cabdbecc0254aa43bfdeec830c33b79a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple heuristics indicating it is malicious, specifically linking to a 'free generator / game hack' lure. The document body and extracted URLs reinforce this, pointing to sites promising Roblox hacks. The primary URL, https://netsecure.pro/app/431946152/free-roblox-hack-script-executrer-game-hack, is the most prominent IOC. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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 https://netsecure.pro/app/431946152/free-roblox-hack-script-executrer-game-hack PDF link annotation
    • http://deyuan-pc.com.tw/images/how-to-hack-roblox-high-school-money.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/how-do-i-input-hack-scripts-into-roblox.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/how-to-speed-hack-roblox-youtube.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/free-robux-cards-2021.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/script-hack-for-roblox.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/prison-break-roblox-hack.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/roblox-its-free-sparta-remix.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/how-to-make-a-3d-hack-shirt-on-roblox.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/roblox-how-to-get-synapse-for-free.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/free-printable-roblox-characters.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
stream_003_off0000427f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x427F 26736 bytes
SHA-256: 093d7d868a20532422d8be58163663003c4171f5c6957b212857fed9a1516bb0
font_01_sfnt_off00007edc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDC 18884 bytes
SHA-256: 264336daa340202ca7cb4e85d438ac7598cd34dbbe5fc6d9b0c5d21d0f514e56

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