Malicious PDF — malware analysis report

Static analysis result for SHA-256 547d915c1ca51715…

MALICIOUS

PDF

33.2 KB Created: 2021-06-29 19:59:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 618cdcaf63bbc2ae448266dfb81bc139 SHA-1: 17522741bbea27d4f22ac80b271a23a94a616cfc SHA-256: 547d915c1ca5171546d0e4954e58c5925951cb5ca07e511feb678f5753e7190e
102 Risk Score

Malware Insights

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

This PDF document contains numerous embedded URLs and a document body that advertises hacks and generators for online games, specifically Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a tactic to drive traffic to potentially malicious sites. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack pattern involves luring users to download or access compromised content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/roblox-jailbreak-hack-2021-speed-game-hack PDF link annotation
    • http://library.stikessuakainsan.ac.id/repository/pastebin-free-roblox-usernames_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-robux-generator-ohne-hanndy-nummer_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/hack-peoples-account-roblox_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/ultimate-driving-roblox-money-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-do-i-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-roblox-account-with-money-on-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-roebucks-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/robux-glitch-free_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-free-items_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/roblox-phantom-forces-hack-download_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-999m-robux-no-survey-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-legally-get-free-spins-in-coin-master_GM406889139.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_off00002b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B23 21680 bytes
SHA-256: 1f7788b6d0f9dc2da4be1793463ce87a4629347c3e2fd87c3aa9fa759be337e6
font_01_sfnt_off00005ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB9 19692 bytes
SHA-256: 7735da7a8aa3018824c99e01b3451c093c54a62c8b3e36c1ec7b0ba55d4ea87a

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