Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a35af682f7a08ff…

MALICIOUS

PDF

35.9 KB Created: 2021-06-26 19:27:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3d139cc8f2f5a4985ebbe6e5c452973e SHA-1: 5ff8f624568ab79450083a63ba3a995b80aa17ed SHA-256: 0a35af682f7a08ffb25f59a4f27fa457a84b11326c22c2f12322568ca006e965
102 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and a heuristic firing for a PDF link farm, indicating a strong attempt to direct users to external content. The document body, though truncated, suggests a lure for game-related hacks and free in-game items, aligning with common phishing and malware distribution tactics. The ML classifier also flagged this PDF as malicious with high confidence.

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/robux-free-no-survey-real-2021-game-hack PDF link annotation
    • http://library.patria-artha.ac.id/repository/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-jailbreak-money-hack-check-cashed_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/arsenal-roblox-hacks-pasebin_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/microsoft-roblox_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/como-tener-ropa-en-roblox-sin-hacks-ni-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-hack-forums_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-200-spin-link_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/hacked-roblox-app-ios_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-links-for-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_off000032c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32C3 22824 bytes
SHA-256: 3da7cb324a5ce6affbc8155c39123dd96aa9c2e495f1447011065d43c43e4d70
font_01_sfnt_off00006612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6612 19488 bytes
SHA-256: 6144a0735cb836d74cd6846fd2d312b56a4cc643d5f348de0e5e051a7183f76a

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