Malicious PDF — malware analysis report

Static analysis result for SHA-256 b044b63db3f7023e…

MALICIOUS

PDF

34.6 KB Created: 2021-06-29 03:42:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 251ecd9b23ee9fd180b2784917e0a886 SHA-1: a523d82d585079332f87a473718ab573c2876802 SHA-256: b044b63db3f7023efedd3685b6fb354eb5d4557665348b00d2ffb61fd65b21b7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that promotes "free Robux" and game hacks, indicating a phishing or scam attempt. The heuristic firings, particularly PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, strongly suggest malicious intent. The document likely serves as a lure to direct users to malicious websites for downloading malware or engaging in fraudulent activities.

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/free-30.000-robux-pastebin-game-hack
    • http://polycraft.ae/uploaded_files/userfiles/files/coin-master-free-spins-hack-apk-download_GM406889139.pdf
    • http://polycraft.ae/uploaded_files/userfiles/files/how-to-hack-roblox-with-inspect-element-2021_GM431946152.pdf
    • http://polycraft.ae/uploaded_files/userfiles/files/coin-master-free-coins-facebook_GM406889139.pdf
    • http://polycraft.ae/uploaded_files/userfiles/files/how-to-get-free-stuff-on-roblox-with-inspect-element_GM431946152.pdf
    • http://polycraft.ae/uploaded_files/userfiles/files/minecraft-bedrock-edition-free-with-java_GM479516143.pdf
    • http://polycraft.ae/uploaded_files/userfiles/files/free-roblox-accounts-with-robux_GM431946152.pdf
    • http://polycraft.ae/uploaded_files/userfiles/files/15-robux-free_GM431946152.pdf
    • http://polycraft.ae/uploaded_files/userfiles/files/spin-hack-for-coin-master_GM406889139.pdf
    • http://polycraft.ae/uploaded_files/userfiles/files/coin-master-download-hack-ios_GM406889139.pdf
    • http://polycraft.ae/uploaded_files/userfiles/files/free-robux-and-limiteds-hack_GM431946152.pdf
    • http://polycraft.ae/uploaded_files/userfiles/files/where-to-buy-pubg-uc-cheap_GM1330123889.pdf
    • http://polycraft.ae/uploaded_files/userfiles/files/cm-spins_GM406889139.pdf
    • http://polycraft.ae/uploaded_files/userfiles/files/free-texture-packs-for-minecraft-pe_GM479516143.pdf
    • http://polycraft.ae/uploaded_files/userfiles/files/non-blocked-cheat-engine-roblox_GM431946152.pdf
    • http://polycraft.ae/uploaded_files/userfiles/files/coin-master-offline-hack_GM406889139.pdf
    • http://polycraft.ae/uploaded_files/userfiles/files/free-roblox-guest_GM431946152.pdf
    • http://polycraft.ae/uploaded_files/userfiles/files/free-money-in-roblox-jailbreak_GM431946152.pdf
    • http://polycraft.ae/uploaded_files/userfiles/files/robux-hack-no-survey-2021_GM431946152.pdf
    • http://polycraft.ae/uploaded_files/userfiles/files/roblox-adopt-me-money-hack-script-pastebin_GM431946152.pdf
    • http://polycraft.ae/uploaded_files/userfiles/files/rise-of-nations-roblox-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fea.bin
f6e10f0c5ec1b8b3aaaa09fd3007186c880f8f4d177f03bb506cf050dd53a72c
pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEA 21964 bytes
font_01_sfnt_off000060a5.bin
10884e0377e8e63cbf822cf00da377f58a617e781f119172abb33028ca7f88ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x60A5 19508 bytes