Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e25dab356da62e…

MALICIOUS

PDF

33.7 KB Created: 2021-07-10 02:39:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 25929929d51231f09a0816cb04ae33bd SHA-1: 7c60e494ec9a065421e2da4bbccc180569ea041d SHA-256: 47e25dab356da62e9847be933eddfcf4bbf4ac9ae6092f4f9a0dbc3508e55d36
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/406889139/coin-master-online-hack-tool-game-hack. This lure is designed to trick users into believing they can obtain game hacks or generators. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

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 http://netcdn.tw/app/406889139/coin-master-online-hack-tool-game-hack In PDF document text
    • http://www.valenciamaids.com/userfiles/files/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-robux-only_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-brown-hair-roblox_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/cheats-roblox-highschool_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-test-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-any-roblox-high-school-car-for-free_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-homepage_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/coin-master-coin-link_GM406889139.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-free-vip-server-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.valenciamaids.com/userfiles/files/roblox-robux-hack-top_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
font_00_sfnt_off00003025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3025 22484 bytes
SHA-256: ee31636bdc474af65a518e6898194303d7a21bce59b387a24397fad4e363fd7d
font_01_sfnt_off000061c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C6 18080 bytes
SHA-256: e55d028ed43e44089d97b54b530531a466e653d2d57bed8153c7241ef5bfe6e5

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