Malicious PDF — malware analysis report

Static analysis result for SHA-256 675005b6b2f9c57b…

MALICIOUS

PDF

36.8 KB Created: 2021-05-20 07:51:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 01c8c77160ed2f6c32ec59711d91a4f9 SHA-1: 2c3a25410e31e4119b57a2334522afd55694812e SHA-256: 675005b6b2f9c57bd27ab105ed76b50a4ced7820459c78a4cd5ee06ed6c73742
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 promoting a 'game hack' lure. The document body, though heavily obfuscated, contains references to the malicious URL and appears to be designed to trick users into clicking the link. The presence of a download button heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier clean score 0.0076

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-java-hacks-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_002_off00002c67.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2C67 25016 bytes
SHA-256: 1d711955f77508b74b8a1a3b917da3abacdc186d1d0012cb5fb449dc7f6f344e
font_01_sfnt_off000065e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E1 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00006f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F92 18020 bytes
SHA-256: 2aa5f75731ce228eb108c5d7ba78fcf9c19ee4c9e640e1738d5748e499ff9746

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