Malicious PDF — malware analysis report

Static analysis result for SHA-256 172c9e994a784887…

MALICIOUS

PDF

34.5 KB Created: 2021-07-01 10:36:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6786bd23d6e9236a69e36896d9f740a1 SHA-1: 2c68e722428c17715f4ecb627cd465b6d7075c13 SHA-256: 172c9e994a7848872eab88c4876b71b41d1e10636b7f99a42e8cf77da66f8dbf
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are structured to appear as downloadable files related to game cheats and free currency. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic suggests a deliberate attempt to host many such lures. The document's content and the embedded URLs point towards a phishing or scam attempt designed to trick users into downloading potentially harmful files.

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.co/app/431946152/how-to-get-free-robux-free-item-game-hack PDF link annotation
    • http://ycstamping.com.tw/image/data/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-conins-free_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-bypass-cheat-engine-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-paintball-level-hack_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/pubg-uc-hack-xda_GM1330123889.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/flamingo-skin-but-its-free-roblox_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-free-robux-for-real-2021-savagefrey_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-hack-apps-download-pc_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/avatar-the-last-airbender-roblox_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/robux-hack-no-downloading-games_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-online-hack-generator_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-hack-someones-rolox-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/robux-codes-generator-no-human-verification_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_off00002f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F4E 22300 bytes
SHA-256: 760c365decbd2d2dd8472825626b4579a337673cb9347a3683d619a57153883e
font_01_sfnt_off0000611a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611A 19244 bytes
SHA-256: 3d080961ebb0845300849c9abb4934b96d6fea92bfe528108a4a88edd6129713

Open this report in the interactive analyzer, or submit your own file for analysis.