Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca52579267933f6…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 22:01:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 80866fcc690d7bf521cf64fec29bf493 SHA-1: d9a7b9089779de9cdf0fffd15acf72ce4d89fc86 SHA-256: 2ca52579267933f68a527232fba828f4772d9eac744446466be36e39328d6c2c
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a link farm, strongly suggesting it is designed to redirect users to external sites offering game cheats or hacks. The ML classifier and PDF heuristics indicate a high likelihood of malicious intent, likely to trick users into downloading further malware or engaging in credential harvesting. No scripts were extracted, but the volume of external links points to a downloader or redirector pattern.

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/431946152/roblox-generator-game-hack PDF link annotation
    • http://lib.kunci.or.id/repository/free-exploit-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-robux-hack-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-december-2021-cheat-engine-speed_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/emotes-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-roblox-on-phone-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-foxy-food_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robux-hack-pro-tv_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-roblox-surf_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-ben-10-universal-showdown-cheat-codes_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-no-human-verification-2021-or-survey-generator_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/80-free-spins-coin-master_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_off00002f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2B 22312 bytes
SHA-256: b3cb16cf7cff96bc1b647185672d11a3e4dd72dd9ba9d559f4f080b448839796
font_01_sfnt_off00006095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6095 18592 bytes
SHA-256: 68271f200223164cdf70c56f3676259a7dde0d10d370ccf87a2c74b2a325e86c

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