Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9019e9f007eb014…

MALICIOUS

PDF

36.5 KB Created: 2021-05-17 21:31:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: fe0ca570c60309ce1c3fef3e1e1905ec SHA-1: 6ac084e72d5db2c4c6707fb7b16034f552f4b5a6 SHA-256: d9019e9f007eb014b0923464a4b1f741682db04d38ac038ed0485d2e0971ed75
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a critical heuristic firing for a malicious redirector link, specifically advertising a 'free generator / game hack' for Roblox. The embedded URL, https://netcdn.xyz/app/431946152/roblox-person-game-hack, is identified as malicious infrastructure. The document also contains a visual download button lure, further supporting the malicious intent.

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/431946152/roblox-person-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_off000034ae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34AE 24912 bytes
SHA-256: f33865b4d4e4175f29ba94a023addab909497c27571070fbbdabfdc89d55b168
font_01_sfnt_off00006e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E31 17936 bytes
SHA-256: f4f04d29b57f2a72625fc9e352393071ee42f2c511d00c6ae5a127c0a3ffd084

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