Malicious PDF — malware analysis report

Static analysis result for SHA-256 287842fd79438c26…

MALICIOUS

PDF

34.6 KB Created: 2021-05-23 11:08:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: fceaec64dc30676fa4bdd95b0af73717 SHA-1: 997059a3a3f701cf4421e0e50df715287c355a41 SHA-256: 287842fd79438c2693e2fc24d97a887c5514de86e3275076ea6e3e0116b3df14
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically promoting "Coin Master free spin" lures. The document body and embedded URLs reinforce this theme, aiming to trick users into clicking through to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

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-spin-today-game-hack In PDF document text
    • http://brokermortgages.com/images/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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_002_off00003031.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3031 23648 bytes
SHA-256: c1cc1a33747eca095b52c27d5b13becde9d647908b1c510e2977e6c5154f9422
font_01_sfnt_off000065f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F7 18240 bytes
SHA-256: a96ac7afd25cadbabafd1b9dbf0a180d0c1833ed2d07acb4363f122556c39d20

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