Malicious PDF — malware analysis report

Static analysis result for SHA-256 183ea781e6ea07be…

MALICIOUS

PDF

35.0 KB Created: 2021-05-30 01:03:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 95c18723771d25fe29d20495c33b6940 SHA-1: 08c022e7fec450dce137756a622a43bb94e548e6 SHA-256: 183ea781e6ea07be273c50868613ed8890999396082e5440f8407c7384e57201
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing for a redirector lure, specifically pointing to a 'free generator / game hack' for Minecraft. The embedded URL, https://netcdn.xyz/app/479516143/minecraft-redeem-code-free-game-hack, is identified as malicious infrastructure. The document body also contains similar text, reinforcing the lure. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, aligning with common phishing or malware delivery techniques.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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-redeem-code-free-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_002_off00002d0c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D0C 26744 bytes
SHA-256: 17940f83d4d5f825ddc85151850ec38781fedc269cbea25eb020c5cabb850950
font_01_sfnt_off00006868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6868 18144 bytes
SHA-256: cc19f71067fb84b21b4f81fd44d646587f5653a8a3073e37b17122851b8ee9dd

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