Malicious PDF — malware analysis report

Static analysis result for SHA-256 bade0b2bc159134c…

MALICIOUS

PDF

35.4 KB Created: 2021-05-16 14:00:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4685e9044c7773a3c020941bb2f1a548 SHA-1: ccbd0d379c61c0d2fa4620c4896b658b010c959c SHA-256: bade0b2bc159134c8336e32b75876a78af119a03bc8f49a73b1aa14164e6d725
130 Risk Score

Malware Insights

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

The PDF file contains a lure for a "free generator / game hack" which redirects to the URL https://netcdn.xyz/app/406889139/free-spins-for-coin-master-game-hack. This URL is flagged as a known malicious redirector, indicating a phishing or scam attempt. The presence of embedded artifacts and the nature of the lure suggest an attempt to exploit user interest in game cheats to deliver a malicious payload.

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/free-spins-for-coin-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_off000032f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32F8 24292 bytes
SHA-256: 8c0144cfe959fc0260460b959cbd51d1bb648241775447fe79009d73fbeb7860
font_01_sfnt_off00006a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2E 17884 bytes
SHA-256: 7a686c540965cac69e1923dfbb6a78ce3f92ec60dbbf6836da21cbb58cd4d6cc

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