Malicious PDF — malware analysis report

Static analysis result for SHA-256 989b39a863db281f…

MALICIOUS

PDF

43.7 KB Created: 2021-05-10 21:10:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 111009db5981b7ca8beb07f140e929f3 SHA-1: 062fb7482fad794b9577ce4d87977dc96d8e1a42 SHA-256: 989b39a863db281fe3b66de4d925849a0159f804250c557f50c999e32b5085f2
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting a "Coin Master Free Coins Cheat". The document body and heuristics indicate a lure for a game hack generator. While no scripts were directly extracted, the PDF structure and malicious links suggest an attempt to redirect users to a potentially harmful site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.0142

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/406889139/coin-master-free-coins-cheat-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003516.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3516 29660 bytes
SHA-256: 8f458135bc8a2444e287b9a3a7a779a0aabf0783ba251ce8bc17e8875a6685d2
font_01_sfnt_off000076a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76A1 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off00008b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2C 17876 bytes
SHA-256: 8d554e61e60aeb014de25df31c65578cfce6635275d7afef547caae0d045a026

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