Malicious PDF — malware analysis report

Static analysis result for SHA-256 655225d628f022c1…

MALICIOUS

PDF

35.3 KB Created: 2021-06-19 23:35:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 83ac216597969a696519f5d7e8cc1c36 SHA-1: 11d16404834991f395deada3ae2004f48c262c40 SHA-256: 655225d628f022c126a2ae0c38f536fe3e7f926132d0cb678fb229cbdf5056ec
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a specific URL in the document body, all pointing to sites offering game hacks and free currency, which is a common lure for malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting a malicious intent to obscure the primary malicious payload or engage in SEO manipulation for malicious purposes. The presence of a 'Visual download / call-to-action button lure' heuristic further supports the phishing or social engineering aspect of this document.

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/dragon-ball-final-stand-hack-stat-roblox-game-hack PDF link annotation
    • https://pustaka.mic.sch.id//repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/pokemon-go-free-accounts-list_GM1094591345.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/give-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/how-to-get-free-roblox-badges_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/roblox-com-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-picture_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/roblox-login-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.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_off000031a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A6 22764 bytes
SHA-256: f632a27c64f46abaac527a65bc5c18b7a70f7ac450d573dae1dd3609513d5cc0
font_01_sfnt_off0000641e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641E 19384 bytes
SHA-256: eccd109443b4226f1406f8f542478446fc9eeca9e6e4369cb420aa250c98ac50

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