Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbafbdafec0ef8c6…

MALICIOUS

PDF

31.8 KB Created: 2021-07-21 06:23:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0a30b119166b7d1c7497f24e4169a793 SHA-1: 3964fa6d16cb43ecc987adfb0e08671b840795ac SHA-256: fbafbdafec0ef8c62d493923c315976e2320dbb8243dc238d1bea061b0d6f036
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious infrastructure, masquerading as a "Coin Master Free Spins Link" and "generator". The presence of a "download button" heuristic further suggests a lure to trick users into downloading a secondary payload. While no scripts were directly extracted, the PDF structure and embedded URLs strongly indicate a phishing or social engineering attack aimed at delivering malware.

Machine Learning

  • Nyx PDF Classifier clean score 0.0622

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 http://netcdn.tw/app/406889139/coin-master-free-spins-link-blogspot-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_002_off00002584.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2584 22816 bytes
SHA-256: 81b217b927534e79f4f5143e29ae018cef4dc18ad8e1a2a36877d326c9f77692
font_01_sfnt_off000058ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58BA 19036 bytes
SHA-256: a1db0e26d638f2546736f1f7b434dee98a1c5e726f40723477b7c203db66759e

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