Malicious PDF — malware analysis report

Static analysis result for SHA-256 5508f988a3a2bc2e…

MALICIOUS

PDF

34.0 KB Created: 2021-06-28 14:02:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 601a0599b5604efd07db2882a24312c6 SHA-1: c3fad5857f426f061ab998a9fe7be34e575aa26c SHA-256: 5508f988a3a2bc2e5288f362d908e20f0d4338148da6d4a7ac785f1f3fda0c54
62 Risk Score

Malware Insights

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

The document presents a lure for free in-game items, specifically referencing 'Robux' and 'Minecraft', and contains multiple embedded URLs pointing to similar content. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being a phishing or malware distribution attempt. The presence of a visual download button heuristic further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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-i-get-free-robux-easy-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/gain-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-and-builders-club-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/synapes-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/www-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-no-survey-no-download-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-catalog-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-gun-games-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-cheat-money-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-ez-ways_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-coin-master-haktuts_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_off00002f2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2D 21792 bytes
SHA-256: 12586ca2d3547424625d3a2293b7221126749e24016397797d1e4200d4be63b5
font_01_sfnt_off00005edf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDF 19332 bytes
SHA-256: 5b7bf20980b296cb0cac0abc63b7737704aef1c13f2ccf17ea9acdcc9f499eff

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