Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c82a71b6a177904…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 23:03:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 18f7bc244916ada64325f87d3004a835 SHA-1: ecf5d9d9e54f03b420b3fe840332f70fe4f36d70 SHA-256: 3c82a71b6a1779041088bc08fbb115941d29769ebcc071cb1e5d90a049134b58
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are hosted on domains related to game cheats and hacks. The ML classifier and PDF link farm heuristics strongly indicate malicious intent, likely to direct users to malicious sites for downloading malware or phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a lure for initial access, possibly via a malicious link or attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/how-to-get-spins-on-coin-master-hack-game-hack PDF link annotation
    • http://opac.acehresearch.org/repository/coinmaster-hack_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/how-to-robux_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/who-to-hack-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/big-paint-ball-roblox-hack_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/pubg-uc-india_GM1330123889.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/speed-roblox-hack-mac_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-roblox-accounts-2021-not-banned_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-free-coins-and-spins-online-tool_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_off00003195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3195 22424 bytes
SHA-256: 8a5a9313b96319fdbcacdaa1b9b59540e36935c7d86e969eef53b3a74b2fb262
font_01_sfnt_off0000636f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636F 18344 bytes
SHA-256: 4391b8fdd94c3e91ab7c8b66dd483ba7ee2647ef2a9573d78ffb2d7635701131

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