Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd920620183d40e4…

MALICIOUS

PDF

37.8 KB Created: 2021-05-10 13:18:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b3bf0c6b13bdf826232c4e613e60cdba SHA-1: ebf0168037e861467d3ada79df492ce835ea7900 SHA-256: bd920620183d40e46bd5b8161cfff9dea1b3ab6f8574fd83706a76f28a5565d5
130 Risk Score

Malware Insights

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

The PDF file contains multiple critical heuristic firings indicating it is a malicious redirector lure, specifically targeting users with a 'game hack' theme. The document body and embedded links point to the URL 'https://netcdn.xyz/app/406889139/coin-master-card-hack-2021-game-hack', which is associated with malicious redirector infrastructure. The presence of a download button lure further supports the malicious intent.

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-card-hack-2021-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_off00003524.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3524 26744 bytes
SHA-256: 814fb21a6d0cd8e170ab31ef0d83ef1ee5e267374c380bdcce027333c6078c2b
font_01_sfnt_off00007227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7227 18292 bytes
SHA-256: 56ed892f9c960ec28c91726eeb440a92294fcef820bc23b96874e10d7a9d3574

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