Malicious PDF — malware analysis report

Static analysis result for SHA-256 72758c4ace2c1de1…

MALICIOUS

PDF

38.5 KB Created: 2021-05-25 09:31:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e2e55204cd6e527c12198b334fb37563 SHA-1: e583081ca1f850768750e5e1ec376c8d00d7b9f1 SHA-256: 72758c4ace2c1de1a9cc903ff0c91f482812e5e21e60ecae4a5cd3afd0007ad6
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt, a common lure for users seeking free in-game items. It contains an external URI pointing to a site offering 'free TikTok followers', and multiple other URLs related to free game currency. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the document's structure and embedded URLs suggest it is designed to redirect users to malicious sites that likely host further exploits or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.xyz/app/835599320/free-tiktok-followers-no-downloads-game-hack
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link_GM406889139.pdf
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/free-robux-card-codes_GM431946152.pdf
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/roblox-fun-com-free-robux_GM431946152.pdf
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins_GM406889139.pdf
    • https://learning.mtsn3kotabekasi.sch.id/__statics/gudangsoal/files/free-robux-no-scam_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002fb9.bin
06303719feac339f975803c0978e2c30b716697fc9351ad5b2bfdba8b5bbddd6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FB9 25460 bytes
font_01_sfnt_off00006b29.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B29 2880 bytes
font_02_sfnt_off00007514.bin
d5c5ec98edba9b40f9bc8010b923702a5e25c64ded77377ab4934560472c0c7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7514 18264 bytes

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