Malicious PDF — malware analysis report

Static analysis result for SHA-256 a344be6c3552c764…

MALICIOUS

PDF

36.5 KB Created: 2021-05-13 09:53:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 11437c33c442d473db1e5b274dbd86e3 SHA-1: c84656d9dd4525b894bf86b8aff6f8a7eeca0396 SHA-256: a344be6c3552c7647389ab5711dfd0f44dd1b828ffe8b1daf27c78cd512a1884
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that are identified as malicious redirectors, specifically leading to a 'free generator / game hack' lure. The document body text and heuristics indicate a clear intent to trick the user into clicking a download button, which redirects to the malicious URL. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

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-ore-finder-mod-game-hack In 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_off00003597.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3597 25284 bytes
SHA-256: 0ad8f522e549ee26c89dc08231a47ebbd4feb54a8c026abd3d6c40c1c223cc08
font_01_sfnt_off00006e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8F 17884 bytes
SHA-256: 3d0c275330d6a7b87118e225175bc9b431f0584a36e1632c85eac693847a7bcd

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