Malicious PDF — malware analysis report

Static analysis result for SHA-256 517074f1bc4eafa4…

MALICIOUS

PDF

35.3 KB Created: 2021-06-27 01:19:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 43e2b630b430e1bbcc165fabad5f31f3 SHA-1: 1e6ef5432b9047c79e1e7ef69022ff9b55c65434 SHA-256: 517074f1bc4eafa41cb1198e82ebaeda7e47c2e90e435eb2070fcfaa10881f50
102 Risk Score

Malware Insights

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

The PDF document contains a high number of external links, many of which are related to game cheats and hacks, indicating a link farm designed to attract traffic. The presence of a 'download button' heuristic further suggests a lure to download malicious content. The ML classifier also strongly flagged this PDF as malicious.

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/how-do-you-get-free-stuff-in-roblox-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/veorra-set-free-roblox-id_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/wurst-client-18-9_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-rich-roblox-accounts-and-passwords-that-work_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-spins-coin-master-apple_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
stream_002_off00002ff0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FF0 23164 bytes
SHA-256: 774fae302fbd21765ddf2262e58ab92d00e626198c41571fbe54c14d53026a72
font_01_sfnt_off000063eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63EB 19388 bytes
SHA-256: 614b1539c3d22b1de5a946e944b15df6e787d2cf755f47147ffbf21c804c3f64

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