Malicious PDF — malware analysis report

Static analysis result for SHA-256 a61997f5def6b6af…

MALICIOUS

PDF

36.5 KB Created: 2021-06-19 17:39:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a7d15eec2ace28112838b7317f946203 SHA-1: e8c67cb6fd9c3305cc11b7ece25814e6b07b815d SHA-256: a61997f5def6b6af236303c9dda4e9defdc57825f3c37f63c928a441a2333621
102 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which are presented as "free Robux" or "game hack" lures. The PDF_SEO_LINK_FARM heuristic indicates a mass of external links, suggesting a link farm or SEO poisoning tactic. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the document, likely aiming to redirect users to malicious websites or download unwanted software.

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-robux-no-human-verification-and-no-survey-game-hack PDF link annotation
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/tiktok-free-view-iphone-5c_GM835599320.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/roblox-auto-clicker-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/coin-master-game-free-spin_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/coin-master-hack-version-33-2_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/minecraft-gun-mod-download-free_GM479516143.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://elearning.mtsmanbaulhuda.sch.id/__statics/gudangsoal/files/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000034d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34D8 22692 bytes
SHA-256: 52a610f60b0937acb9265c5d9ba321bc34d6ae19f4b9109251e9a02721ae1edb
font_01_sfnt_off000067a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67A9 19800 bytes
SHA-256: fcd4d125090859beb8b270f882485097339e29693181c3776c14839bc9dcd643

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