Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2b744de7e6aee5d…

MALICIOUS

PDF

46.7 KB Created: 2021-05-19 12:05:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: aa43bf1096d66f7fa6dcc32032255497 SHA-1: d64801da20c8abb34937d548bd54880e6a689fc5 SHA-256: c2b744de7e6aee5d0d2dc27f27a52c353c37b1f2e8cf4a7046250b0f455278a6
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded links that redirect to known malicious infrastructure, specifically advertising a 'free generator / game hack'. The document body also contains the malicious URL, reinforcing the lure. While no scripts were directly extracted, the PDF structure and heuristics indicate a malicious redirector is being used to likely download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0123

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/479516143/minecraft-mod-updater-game-hack In PDF document text
    • https://www.youtIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000034af.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34AF 25260 bytes
SHA-256: eb29945c60d3b75ae0433fd866ed3d4e3dbbefa6a7c34ee7d787f8f4ff45dce9
font_01_sfnt_off00006d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6D 7936 bytes
SHA-256: 218d53b68bdddb064f6fba4be822d5b3725ed1cef1a3b42796a8dd99c4a62f4e
font_02_sfnt_off00008696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8696 4232 bytes
SHA-256: ab6320ab342704d2c5943abfba82ed4837bf2da871c91621741fd4cfd15c6ed5
font_03_sfnt_off00009522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9522 18244 bytes
SHA-256: d5b3e01345ae806e3fb9929e05062337cbc27f38a62a69179378268a2260776d

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