Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da24f6914b2ac55…

MALICIOUS

PDF

37.0 KB Created: 2021-05-12 04:01:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e405b31a0a240335f5dbecc746659c1a SHA-1: 30e38bba9385adcfc61b437971d49ad7c9787f45 SHA-256: 2da24f6914b2ac55f5114e29d93e0adae83e1269329a23fa4af4cf36f5db3f4d
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious URL. The document body also contains text and links that reinforce this lure, attempting to trick the user into downloading a malicious payload. No scripts were extracted, but the primary attack vector appears to be a deceptive link within the document.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/coin-master-mod-apk-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_off000034ee.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34EE 25388 bytes
SHA-256: ea8f552e179f1af5c6a5b042cb678371480fdc82613d39d6477a910a4c4e20da
font_01_sfnt_off00006fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCB 18068 bytes
SHA-256: b41b00b03ce87291eba0dd85e91a6f7f7f395b53aa8529f4df5d3819e50e6afc

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