Malicious PDF — malware analysis report

Static analysis result for SHA-256 930df8fe125008bb…

MALICIOUS

PDF

38.8 KB Created: 2021-04-22 15:14:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: efbacfd07290eea0bcf79887148a562b SHA-1: 13ab052b3b3f711807c65c65f60b8d3fc423e799 SHA-256: 930df8fe125008bbbd1a3683f204d0618d9ff7396ce2e3f85b5c6f1873104969
122 Risk Score

Malware Insights

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

The PDF document contains multiple links to websites offering "free Robux" or "game hacks", a common lure for phishing or malware distribution. It also contains an instruction to disable security software, indicating a malicious intent to bypass defenses. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9408

Heuristics 5

  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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/how-to-get-free-robux-no-robot-proof-game-hack PDF link annotation
    • http://reclaimcottage.co.uk/images/roblox-build-a-boat-for-trasure-fly-hack.pdfIn PDF document text
    • http://reclaimcottage.co.uk/images/robux-hack-no-password.pdfIn PDF document text
    • http://reclaimcottage.co.uk/images/grab-knife-hack-roblox.pdfIn PDF document text
    • http://reclaimcottage.co.uk/images/hack-para-roblox-lumber-tycoon-2.pdfIn PDF document text
    • http://reclaimcottage.co.uk/images/programa-para-ser-hacker-en-roblox.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_off00003c24.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3C24 24940 bytes
SHA-256: b92d96c035e5fdbe8a483217d672a6e275a073eaa705bb48484a7ef76db4a36b
font_01_sfnt_off000075aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75AA 18436 bytes
SHA-256: 182a3c71b9f8196c66be0fd562dc55b3219c4de0ce4280ff1ca5570c4129866e

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