Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca7ef9bd08b830d6…

MALICIOUS

PDF

37.6 KB Created: 2021-05-12 05:10:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4aefe8faaa302730b2027a071056f808 SHA-1: 9819ffce03dfbf4059ef1b284f5348b410d1a363 SHA-256: ca7ef9bd08b830d6ee5cc478089607e12a1274327c0d389c0f363b24ccfd1019
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a malicious URL. This URL is also listed as a known malicious redirector. The document body, though partially garbled, contains references to the same URL, reinforcing the lure. The presence of embedded URLs and the nature of the lure suggest an attempt to trick the user into downloading potentially malicious content.

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/free-spin-coin-master-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_off00003649.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3649 26400 bytes
SHA-256: 89a8b2af87f4795f76d980b76bfe7654198f588e363795afe8859dbb9a0e1dda
font_01_sfnt_off00007259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7259 18056 bytes
SHA-256: 7f2e174e1afd465ef12bc01317bb6b03aaf654ca66d004136e98d06ab5dd2bbd

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