Malicious PDF — malware analysis report

Static analysis result for SHA-256 362337480d098a02…

MALICIOUS

PDF

39.2 KB Created: 2021-05-16 03:33:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1e4732782c802fba5e321cdbe38261f7 SHA-1: 6a7356939439f0d946b4ee88593a8a2b67156ae2 SHA-256: 362337480d098a02b619ebf3a2b6f8fd2a73b4e33e4a0b40fbcb0490a987f671
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple heuristics indicating malicious redirector links, specifically pointing to a "free generator / game hack" lure. The document body and embedded artifacts reinforce this by displaying similar deceptive text and URLs. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-hacks-no-verification-game-hack, which is likely used to deliver a secondary payload or lead the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/free-robux-hacks-no-verification-game-hack In PDF document text
    • https://www.communes.comIn 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_off000033a9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33A9 24664 bytes
SHA-256: 6062b484837f6924de2e587d05015b54c592ba396e5816924ec6bac8b94b8698
font_01_sfnt_off00006c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5A 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off0000760c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x760C 18772 bytes
SHA-256: addbd32849de550f6a3cbf56c70cbffa7cf804e2f09d57d2f784457513eafccd

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