Malicious PDF — malware analysis report

Static analysis result for SHA-256 d40650e090cb8776…

MALICIOUS

PDF

36.7 KB Created: 2021-05-23 10:43:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4a536c2c08563562523dfd961820d034 SHA-1: 5aaeca6212a1e4bd7ccec3849dce390156916f14 SHA-256: d40650e090cb8776487d8950915a386016f1f149f3422e3194b89c569abbc3f0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to a 'free generator' or 'game hack' lure, aiming to trick users into downloading further malicious content. The document body explicitly mentions 'free TikTok fans' and 'game hack', reinforcing the social engineering aspect. While no scripts were directly extracted, the presence of embedded URLs and the heuristic firings strongly suggest a malicious redirector chain designed for malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9616

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.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://netcdn.xyz/app/835599320/how-to-get-free-tiktok-fans-without-human-verification-game-hack In PDF document text
    • http://meisterhaus-guterl.de/images/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://meisterhaus-guterl.de/images/coin-master-free-spin-software_GM406889139.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_002_off00002e69.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E69 27892 bytes
SHA-256: 28d59a0307167fb648fe01250ebf90ddf3a3309c62a07a975a08a5a2ce3ed8cb
font_01_sfnt_off00006d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D01 18748 bytes
SHA-256: 9c1c07c767fa9d9d53b8a100ba390363441f73e8e5d8be898b87013d8ae4ffbd

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