Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a372068afa72877…

MALICIOUS

PDF

43.6 KB Created: 2021-05-17 15:37:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b14205e08abd9efd4f3f25599e10aecb SHA-1: 2e0c255b2a165b1673a97e5bdc5f47f7ffaeb794 SHA-256: 2a372068afa72877fa61fcbdaae311c2feb7ab3e45d43f4513caae1cf66b78b9
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link that redirects to a 'free generator / game hack' lure, indicating a social engineering attempt to trick the user into visiting a malicious site. The document body text and heuristics confirm this redirection to potentially malicious infrastructure. No scripts were extracted, but the primary attack vector appears to be a deceptive link within the document.

Machine Learning

  • Nyx PDF Classifier clean score 0.0152

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/431946152/how-to-get-free-stuff-on-roblox-2021-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_off00003f2f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3F2F 26572 bytes
SHA-256: 0c2d249c2b30edf765dba278487f789899d121d295356f8f26f7a6e84e9e4e35
font_01_sfnt_off00007e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E07 2812 bytes
SHA-256: fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f
font_02_sfnt_off000087a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87A7 18756 bytes
SHA-256: 01b08735d8bd742c760d3aa19da793060d229319054e586f294f1894fe425724

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