Malicious PDF — malware analysis report

Static analysis result for SHA-256 72fffe350fc17c6b…

MALICIOUS

PDF

44.3 KB Created: 2021-05-20 00:27:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: b265e5a5ea4f0dea62a78b49f57e73d8 SHA-1: 3966f15e31b93078fc54406a8e4b05e347b5d306 SHA-256: 72fffe350fc17c6b3b4afc1993942361e228c616cb9a78e4e32f759e1cf5cee0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple links to known malicious redirectors and hosts further PDF files, indicating a phishing or malware distribution campaign. The document body and heuristics suggest a lure related to 'Coin Master' game hacks, aiming to trick users into clicking malicious links. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-hack-reddit-game-hack In PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/roblox-assassin_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/win-free-robux_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/coin-master-free-spins-bit-ly_GM406889139.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/free-spins-coin-master-hack-2021_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_off000051b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51B1 25868 bytes
SHA-256: 0da943d55608cb706a803aa6c20d1d36578768a789bc7f4d69621fbf48135f1f
font_01_sfnt_off00008c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C27 17888 bytes
SHA-256: 63a6a5d9916b9ee5af7207625cec6907b74dd50493b17e0c9eae8777c3cfd91e

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