Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ea4915524f84cc7…

MALICIOUS

PDF

37.0 KB Created: 2021-05-22 01:33:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 88b547dd4d2d63508b0d9362d0994576 SHA-1: a3886f358aab6d185539512402010e8029755986 SHA-256: 6ea4915524f84cc7a2f9ecdc6adbe4addc816a9161f9078e2617393ad240490f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The document body and embedded links suggest a phishing attempt to direct users to potentially malicious content, likely for credential harvesting or further malware delivery. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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-daily-free-spins-link-today-game-hack In PDF document text
    • http://lamascheradiferro.dk/images/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/114-hacks_GM479516143.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-robux-human-verification_GM431946152.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_off000035a8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35A8 24564 bytes
SHA-256: 1b4545afa79f1e7020095a7b1480fd1f4b5247a8c7b89437acbf76a464fdcaa9
font_01_sfnt_off00006e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E16 18652 bytes
SHA-256: b7acebacf47409c7f0f2932ba41e4c1dc120b4ef5280387cf9333091bd47b2e0

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