Malicious PDF — malware analysis report

Static analysis result for SHA-256 5648ce9af1d0160a…

MALICIOUS

PDF

36.2 KB Created: 2021-05-12 18:05:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d2a78602f111e92f50eece6673a28001 SHA-1: e535b361f341fe195ef864f4584412207b944b52 SHA-256: 5648ce9af1d0160aa3007b3ce72f8b8bae6ba362b5ab56ae3a17d3c55ff5244e
190 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a redirector lure, specifically linking to a "free generator / game hack". The embedded URL, https://netcdn.xyz/app/406889139/cone-master-game-hack, is identified as malicious infrastructure. The document body also contains a call-to-action phrase and the URL, reinforcing the lure. The heuristic for requesting recovery secrets further suggests a credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0302

Heuristics 5

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/cone-master-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_off00003519.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3519 25252 bytes
SHA-256: a850f6fe49f1c7aa1d380018a8bd5c59537b04be2d86a3fcdf904eb927be7346
font_01_sfnt_off00006eab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAB 17428 bytes
SHA-256: 45c4e899866d0d24dcae3cea52e6ee867e16b7903319074fc523b8217c98ba84