Malicious PDF — malware analysis report

Static analysis result for SHA-256 8855ee16e2eb3a65…

MALICIOUS

PDF

35.2 KB Created: 2021-05-10 11:54:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 98c284ed61b6383a9b3e3d9bc89d1028 SHA-1: a792921d0ae1cde18976356bc3a680ba67b28abb SHA-256: 8855ee16e2eb3a657b50e0cf9e8a2e810db388a253df187054925d71bc5a1010
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 "Coin Master Hacker Club" generator. This link, https://netcdn.xyz/app/406889139/coin-master-hacker-club-game-hack, is known to lead to malicious infrastructure. The document body also contains references to this lure and a call-to-action button, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0306

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-hacker-club-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_off0000322e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x322E 23884 bytes
SHA-256: 281b096a0c24788dbb8c422f61abef0b8b9012a4069e722c92a4efee45aa61d0
font_01_sfnt_off0000689a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x689A 18088 bytes
SHA-256: 489fcd50e077ea385706302a414b20846aa2690c2d534c5e871bb508b565cca7

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