Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f67e8f476ab247…

MALICIOUS

PDF

32.1 KB Created: 2021-07-19 09:21:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0612e9c4d2598c8f89809f67b65b175a SHA-1: bb3807725267d8d8e73b176adef7e95feb2117e9 SHA-256: 72f67e8f476ab24730734b66ebea7d728cb2c2e397c9ba26c2e0c92d8c5fd78b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, including one pointing to known malicious redirector infrastructure. The document body and heuristics indicate a lure for game-related cheats or generators, designed to trick users into visiting the malicious URL. No scripts were extracted, but the presence of embedded URLs and the lure suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9452

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 http://netcdn.tw/app/406889139/haktuts-coin-master-free-spin-link-game-hack In PDF document text
    • https://www.yatatravel.com/uploaded_files/userfiles/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • https://www.yatatravel.com/uploaded_files/userfiles/files/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.yatatravel.com/uploaded_files/userfiles/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.yatatravel.com/uploaded_files/userfiles/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://www.yatatravel.com/uploaded_files/userfiles/files/free-robux-games-that-actually-work_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_off000028fe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x28FE 22912 bytes
SHA-256: 5d9e065b4b98675e08e4deaba40905a499306e54299b85c07811e9869d3cef78
font_01_sfnt_off00005c3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3C 18196 bytes
SHA-256: d21f7c9777ff22c572caba6bc61bff535e054503ba9d308437b2513133ac2854

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