Malicious PDF — malware analysis report

Static analysis result for SHA-256 95732c894361700e…

MALICIOUS

PDF

28.7 KB Created: 2021-05-10 19:34:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 49548a7bc107beb8f9f44a357d77f2fa SHA-1: 6f7e2eb93ae4461fa5c49bdddd9814277c962cbc SHA-256: 95732c894361700e8c7f5c0f32567fe0b8801282fdda09b4b763d5f45d458d83
168 Risk Score

Malware Insights

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

This PDF document contains embedded JavaScript and multiple links to redirector infrastructure. The document body and heuristic firings indicate a lure for game-related hacks and free currency, likely to trick users into downloading further malware or engaging in phishing. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-vip-roblox-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9747

Heuristics 5

  • 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 JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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-vip-roblox-game-hack In PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/coin-master-golden-cards-hack_GM406889139.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/app-store-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/minecraft-pe-mod-menu_GM479516143.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/robux-for-surveys_GM431946152.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/robux-redeem_GM431946152.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • http://leads-bd.org/app/webroot/js/ckfinder/userfiles/files/como-hackear-coin-master-sin-verificacion-humana_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
font_00_sfnt_off00002342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2342 19852 bytes
SHA-256: 67793e3ec017440129babb7e4d13ed560c9692c05d336b80a12e7155a5ef2978
font_01_sfnt_off00004d1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D1A 18380 bytes
SHA-256: 94d125d3dbde40cc9d5054aafe15a05973ae878bc41c5e9bff003f3b9c84471a

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