Malicious PDF — malware analysis report

Static analysis result for SHA-256 18147b1e69e66bd3…

MALICIOUS

PDF

36.9 KB Created: 2021-05-12 18:09:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 9abcd10c1a62c7d161ae394a872c0ef3 SHA-1: 7e1df97b21fb0739d8b71a4110d3c0feb2fdb788 SHA-256: 18147b1e69e66bd3db5e1fa968822b8c37e14d8d1c81ffdd2ccd408c32ad5db9
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple heuristics indicating it links to malicious redirector infrastructure, specifically promoting a 'free generator / game hack' for Coin Master. The primary URL identified is a known malicious redirector, suggesting the document's purpose is to lead users to potentially harmful content or further malicious sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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-free-spins-that-really-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_off000034ea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34EA 25688 bytes
SHA-256: 96a26b0847d5f7fd49c0efb685a965e0febe675491bbdd15edb3a245a173acb4
font_01_sfnt_off00006ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE4 18308 bytes
SHA-256: 9280bacae3ad0da4146be41547e1663b6e8aa07aae351ce46264d323328a6377

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