Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2f0054053c28c2…

MALICIOUS

PDF

36.9 KB Created: 2021-05-10 12:09:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c9b49d61e666a69acaf4fae0f87aa944 SHA-1: fcb754e83dc6f91c305ef8724cc039f7e61709ae SHA-256: af2f0054053c28c26185ddde8c9cd63ae5401849663abf6d5ab4420bb2cc1c42
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious redirector link disguised as a 'Coin Master Fun Free Spins' generator, aiming to trick users into clicking it. The heuristic firings indicate this is a lure for a game hack, leading to known malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0313

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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000331c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x331C 26428 bytes
SHA-256: 6f5d11f0f6fa8285c289e42242ecd8cca4adf833c71760f743a9b176843f4130
font_01_sfnt_off00006fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB2 18028 bytes
SHA-256: b886d19e0857ddff44b85450f57c8c2707e7243da381be74ba2c44e7741ea293

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