Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d38b342df13dc72…

MALICIOUS

PDF

39.5 KB Created: 2021-05-10 11:46:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 95512be8c3d0a00d7e4f95e02d0cf8e2 SHA-1: 87c094c9addc122f17937ccccec7b253a76c594f SHA-256: 6d38b342df13dc72e87da04f32562ba9cf481519be354f3fb36acd0839bef0b8
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'game hacks' and includes a critical heuristic firing for a malicious redirector link. The embedded URL, 'https://netcdn.xyz/app/406889139/how-to-hack-coin-master-game-without-root-game-hack', is associated with known malicious infrastructure. The document body also contains a call-to-action phrase, reinforcing the deceptive nature of the lure.

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/406889139/how-to-hack-coin-master-game-without-root-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_off0000335b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x335B 24948 bytes
SHA-256: 8f8a48f5bd58250f9b81339f88058b1772ecbd1ac3306122a84c536ed9257568
font_01_sfnt_off00006b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8D 3544 bytes
SHA-256: 8566367de3ef270a70fb982a1e25c7e4db1183b2dde47a9207215c285a2d0ded
font_02_sfnt_off00007811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7811 18644 bytes
SHA-256: 5b0b6c654ae884b7a351bf787d45d43166c87cb8727a18cb45f58fffc41445c6

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