Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c7a50a1be17ddf6…

MALICIOUS

PDF

36.8 KB Created: 2021-05-10 19:18:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5e11ce32b9500011294db8d7bf12b2c1 SHA-1: d72bc12c3bd53e88d8388b5fa6201069e2322fcf SHA-256: 3c7a50a1be17ddf6741eb9aa82a88b1002ba1d500b0176a856cf7066c22fd3d2
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'game hack' generator, directing users to a known malicious redirector URL. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the presence of malicious redirector infrastructure. While no scripts were extracted, the document's structure and embedded links strongly suggest a phishing or scam attempt, likely using a social engineering pretext to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier clean score 0.0292

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/how-to-log-out-of-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_off0000340e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x340E 24864 bytes
SHA-256: f4efee27d5db9758989f9089e28907a612fbc5b29ef03e1d3699f6d2bcef0c80
font_01_sfnt_off00006c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C1E 19016 bytes
SHA-256: ded0c77c64dc92683ef64872c1ed84b0f72c76a0d048eaf6d978f06bbee3742b

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