Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8637ed09fe0c3b1…

MALICIOUS

PDF

39.2 KB Created: 2021-05-13 01:35:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 6d1f0b251ccf95e18e1fbccf4f48e838 SHA-1: 0504956a58f6d54f4ca6444166f3ddc3762a0a68 SHA-256: e8637ed09fe0c3b1cc9cf892abf6b3c2d74cb6e89d728a5def29e671db5b88e0
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically advertising a "game hack" and "free coins". This link, https://netcdn.xyz/app/406889139/clean-master-free-coins-and-spins-game-hack, is designed to lure users into clicking, likely leading to a further exploit or malware download. The presence of a "download button" heuristic reinforces this social engineering tactic.

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/clean-master-free-coins-and-spins-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_off00003515.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3515 25196 bytes
SHA-256: 3202f2c6a2709179bc7206302550fce314519ce47581d727f9ffec9a782157f7
font_01_sfnt_off00006d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D97 18132 bytes
SHA-256: 1cd25d0b7dc3a8185d8e8b92174428e8871a6a2908bfb4dc1c2b5806b24c5c26
font_02_sfnt_off00008f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0D 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

Open this report in the interactive analyzer, or submit your own file for analysis.