Malicious PDF — malware analysis report

Static analysis result for SHA-256 189d60d0f9202a04…

MALICIOUS

PDF

38.4 KB Created: 2021-05-10 12:31:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 6b4177265620906f3c08173b2b2a88c9 SHA-1: 9a29f2e50cb70f240f74680d75c8fa660050cfd1 SHA-256: 189d60d0f9202a047a8e5ff5c958425dd8c89b4e723de1a600e75f78e3ef99d5
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a game hack redirector lure, pointing to a specific URL. This URL is likely used to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains references to the same URL, reinforcing the malicious intent. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier clean score 0.0131

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-online-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000031cd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31CD 25248 bytes
SHA-256: 769c5633eda2206c1947e791fa1aea6baf0cd2170f269498abaa1c07445fa610
font_01_sfnt_off00006ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA7 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00007559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7559 17960 bytes
SHA-256: 74290823a42a0e75a5f3b604468006cc436fdd58a7c76d339be163c45ff8bb63

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