Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de1d862b3ad4498…

MALICIOUS

PDF

36.5 KB Created: 2021-05-23 11:45:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 00873c95b76abbf82efd9661a90896c9 SHA-1: ecbed052b54e001b2853276f67aef607e2a5c8d9 SHA-256: 3de1d862b3ad449832e43c18d219a259788aaccf3df3f4b83e9d9b35be033061
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded links that redirect to known malicious infrastructure, specifically advertising 'free generator' or 'hack' content for games like Coin Master. The ML classifier also flagged this PDF as malicious. The primary lure appears to be a fake download or generator, aiming to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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-spins-coin-master-unlimited-game-hack In PDF document text
    • https://www.audev.com/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.audev.com/images/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://audev.com/images/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • https://audev.com/images/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://audev.com/images/free-robux-picture_GM431946152.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_off00003263.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3263 25764 bytes
SHA-256: c40d76fee742f0affe057726e870e42650d75da8972a4a6c29491f5ebe6c7256
font_01_sfnt_off00006cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC2 18580 bytes
SHA-256: 8aad0f2405ec9a3272b05944b48a23572f7af0293916013bea6eee8874d320e7

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