Malicious PDF — malware analysis report

Static analysis result for SHA-256 73c5c8ec4dc4f732…

MALICIOUS

PDF

38.6 KB Created: 2021-05-11 00:07:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e6a0032248fdb8c38621e53ed47a7d3d SHA-1: a333cff4be4b797adca31ac118d0288940b00a19 SHA-256: 73c5c8ec4dc4f7327f1769bc213851e071d8e84179e83cd6b54075fc8d0efd6c
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic indicating it links to a malicious redirector disguised as a game hack generator. The embedded URL, 'https://netcdn.xyz/app/479516143/free-online-games-like-minecraft-game-hack', is the primary indicator of malicious intent. While no scripts were directly extracted, the PDF structure and heuristics suggest a lure to a malicious site, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier clean score 0.0289

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/free-online-games-like-minecraft-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_off000034f7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34F7 24344 bytes
SHA-256: 878ada23d572a96163be1a45c6c87dd486ca4ca7d8a2653e247da66dbbbfa70e
font_01_sfnt_off00006c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C55 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00007607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7607 18072 bytes
SHA-256: 246b849e2f56f6dfbc2c344cbb2402d5c34ee1f8458d292b794ed9a5a308c484

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