Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c10bc3eff7ba73…

MALICIOUS

PDF

36.0 KB Created: 2021-06-29 06:10:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: fb0e4f8bc30ee910e29a255f4c7c4b7e SHA-1: d394ffc953e2b8cacab3230fea5437bf8c03d59e SHA-256: 65c10bc3eff7ba736052b40b9d8b3573df771c999f36bf34061b968c22324cac
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.co/app/431946152/como-ser-un-hacker-en-roblox-impact-y-sin-virus-game-hack In PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-hack-anti-ban_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/robloxmodz-site-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-spin-blogspot_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/pokemon-go-kanto-free-pass_GM1094591345.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-streets-of-bloxwood-remastered-hack_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/tiktok-free-view-40_GM835599320.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/roblox-shop-free_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/cheats-for-roblox-pokemon_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/how-to-hack-coins-in-archery-master-3d_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/robux-hack-2021-proof-no-inspect-element_GM431946152.pdfIn PDF document text
    • https://xiangquan.com.tw/image/data/files/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3160 23336 bytes
SHA-256: 83b322529f28a5a56c303958be61f74cad8ebcb9d359d1fdbaab6baf579d982c
font_01_sfnt_off000065ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65EA 19752 bytes
SHA-256: b33f957d017990f7f39af7929a0db3e5a9565327f8edafe0c86926946a733d20

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