Malicious PDF — malware analysis report

Static analysis result for SHA-256 2714f0d99ff313ce…

MALICIOUS

PDF

41.5 KB Created: 2021-05-14 02:36:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 18edcb194e011b7f419f0fe19109321a SHA-1: 30ca4bf54106e88178188c21614cfb971c09dfab SHA-256: 2714f0d99ff313ce631d9e9ba5193ef037015e34ae36aea5557b0d4768bf269e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure, promising free game currency and hacks to entice users. It contains multiple links to redirector domains, which in turn host further malicious PDF files. The primary redirector URL is identified as malicious infrastructure, suggesting a chain of malicious downloads and potential exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-free-coins-and-spins-link-2021-game-hack In PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/robux-free-co_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/roblox-c9m_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/coin-master-today_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/free-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/coin-master-35-2-hack_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/coin-master-spin-link_GM406889139.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_off00004998.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4998 23512 bytes
SHA-256: a44346174580cd09056124cd44cbf274f1e8ecacd7c743eebd8e3740723c6d99
font_01_sfnt_off00007e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E76 18632 bytes
SHA-256: 71f56f689d85b0b5fb096b2af3108c2926ec739bdf89e53e90d40c81af8f43d2

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