Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a8eca0081f1d913…

MALICIOUS

PDF

41.4 KB Created: 2021-05-11 01:43:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a91f93e0cc98daa3022d14fad6ddd129 SHA-1: 7ca6889d5a38a6990b43f0f5795035799b46ba65 SHA-256: 1a8eca0081f1d913989b2a9e609603dd5689c484312cfafffbba9873de247e95
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically advertising a 'free generator / game hack'. The document body also contains text and a call-to-action button related to this lure. The primary malicious URL identified is https://netcdn.xyz/app/479516143/how-to-get-minecraft-for-free-on-xbox-360-game-hack, which is associated with malicious redirector activity.

Machine Learning

  • Nyx PDF Classifier clean score 0.0125

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/how-to-get-minecraft-for-free-on-xbox-360-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_off00003673.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3673 26952 bytes
SHA-256: f53ea6214b857bccb24bcd1cac3e2c42c3a92ddf1726777f88a44fe712a7d296
font_01_sfnt_off0000740b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x740B 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off00007e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E07 18984 bytes
SHA-256: f47c6db87afe0eab762f9c642f79da0b31915930cbe30facc3d257340af03a9d

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