Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f027443890d552…

MALICIOUS

PDF

43.2 KB Created: 2021-05-16 09:02:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2d416ff7a7b1220065933da672ac6ffa SHA-1: 7f80a027ff9202b0b26ea0d6db2760d578e3104e SHA-256: 29f027443890d55243147e9580102aaacd60d7672d28844d3e89db6884d5d0c6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including one identified as a malicious redirector infrastructure. The document body and heuristic firings indicate a lure for game hacks and free generators, suggesting a phishing or scam attempt. The embedded links likely lead to further malicious content or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/free-robux-please-game-hack In PDF document text
    • http://deyuan-pc.com.tw/images/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/coin-master-hack-program_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/coin-master-mod-free-download_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/roblox-robux-page_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/how-to-hack-coins-in-archery-master-3d_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/roblox-com-r_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/how-to-hack-any-roblox-account_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_003_off00004903.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4903 26856 bytes
SHA-256: ee1fd1f1534508c7252da5f08bae0fca66ffee7e6a3c58b9b04760ce1e9126cb
font_01_sfnt_off000085d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D7 18472 bytes
SHA-256: a4143b220e35e332e52efa777ecf598d1a164c1d6c5ab1887881bf2674d2e637

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