Malicious PDF — malware analysis report

Static analysis result for SHA-256 545b5aefb0a2b57c…

MALICIOUS

PDF

35.9 KB Created: 2021-05-22 06:05:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: cff5e3b3cab134bc707ac0a064228123 SHA-1: c4db71519ce93542a0903f03153240fe47eaaae5 SHA-256: 545b5aefb0a2b57c625edb99e7a71d7f81aafc6b2163b001417c3df881b38300
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' lures. The document body and embedded URLs suggest a phishing attempt to trick users into downloading further malicious content. While no scripts were explicitly extracted, the nature of the lures and the PDF structure strongly indicate a malicious intent to deliver a second-stage payload.

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-daily-spins-coin-master-game-hack In PDF document text
    • http://huizentekoop-andalusie.nl/images/tiktok-free-internet_GM835599320.pdfIn PDF document text
    • http://huizentekoop-andalusie.nl/images/free-800-robux_GM431946152.pdfIn PDF document text
    • http://huizentekoop-andalusie.nl/images/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://huizentekoop-andalusie.nl/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://huizentekoop-andalusie.nl/images/minecraft-hacked-client-18_GM479516143.pdfIn 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_off000031d1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31D1 25068 bytes
SHA-256: 5fb7121609263d56b7fd3d61c454ce0d74aa39cdc1a3f175cf4af16cd72b3509
font_01_sfnt_off00006b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B00 18308 bytes
SHA-256: 55eaac4e6bbee5e06de7435d22c867d27a3c8151a397b13177f5239675c95764

Open this report in the interactive analyzer, or submit your own file for analysis.