Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa12afef690ffc7…

MALICIOUS

PDF

33.1 KB Created: 2021-05-23 16:21:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 41534bd8830adb9a3fcd5f8c3a73145f SHA-1: 78affa173905265e7e05dd622619ce1197998b7c SHA-256: 4fa12afef690ffc7e5f4bb2fc0fa30bc1457150f73a8de5fc7b2101daacc5a33
152 Risk Score

Malware Insights

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

The PDF contains multiple links that redirect to malicious infrastructure, specifically advertising 'free Robux' or game hacks. The document body and heuristics indicate a lure to a redirector, likely to download a second-stage payload or phish for credentials. No scripts were extracted, but the embedded links and heuristic firings strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9713

Heuristics 3

  • 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.
  • 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/431946152/free-robux-game-hack In PDF document text
    • http://demenagementlandry.com/images/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://demenagementlandry.com/images/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://demenagementlandry.com/images/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://demenagementlandry.com/images/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://demenagementlandry.com/images/free-minecraft-account-list_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000030a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30A7 25720 bytes
SHA-256: ad15a6471edc92e777626dc4ce20a7c85cc33c4045bc8fcc6f9f1761955796fb

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