Malicious PDF — malware analysis report

Static analysis result for SHA-256 d53a5518fb5dfd6f…

MALICIOUS

PDF

35.3 KB Created: 2021-07-03 20:53:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1a3ecca2505ec9b3ed5c6ddc8eac0d3e SHA-1: 6bb23db4f6a07e5257a90fd609caa3a4a6a1d0f1 SHA-256: d53a5518fb5dfd6f0dfa3c129efdb1162095d6d76b432c75d1d0443439fa2428
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, many of which are related to game hacks and cheats, indicating a lure for users to download potentially malicious content. The ML classifier also flagged this PDF as malicious with high confidence. The document body and embedded URLs suggest a phishing or scam attempt.

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/coin-master-hack-android-no-root-game-hack
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/free-hack-scripts-for-roblox_GM431946152.pdf
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/free-robux-websites-no-human-verification_GM431946152.pdf
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdf
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/coin-master-redeem-code-free_GM406889139.pdf
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/how-to-hack-stats-on-a-roblox-game_GM431946152.pdf
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/free-robux-no-password_GM431946152.pdf
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/how-to-get-20210-robux-for-free_GM431946152.pdf
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/how-do-you-get-free-skins-on-roblox_GM431946152.pdf
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/how-to-get-minecraft-realms-for-free_GM479516143.pdf
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/best-way-to-get-free-robux_GM431946152.pdf
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/minecraft-mac-free_GM479516143.pdf
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/hack-robux_GM431946152.pdf
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/minecraft-handbook_GM479516143.pdf
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/logiciel-de-cheat-roblox_GM431946152.pdf
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/how-to-hack-coin-master-pc_GM406889139.pdf
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/pokemon-go-3-free-raid-passes_GM1094591345.pdf
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdf
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/free-spins-and-coins-for-coin-master_GM406889139.pdf
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/coin-master-daily-free-link_GM406889139.pdf
    • http://ppl.man2kediri.net/__statics/gudangsoal/files/minecraft-wurst-client_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000335b.bin
ad02fd9198ab57eb4457977238077cc8bd5918264dfd44b1b37c752294174ce6
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x335B 23220 bytes
font_01_sfnt_off000067bc.bin
078f398049db1933948ee742c19e5c99963415d81bdc37a2d32be03f9ca244ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x67BC 18180 bytes