Malicious PDF — malware analysis report

Static analysis result for SHA-256 b93b7d816411f9ba…

MALICIOUS

PDF

35.2 KB Created: 2021-06-29 14:18:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ff2d8b9712b2a9a11f2f975f08f7e0a4 SHA-1: e0dc40aa503aab01b45ae73a57a08c1c8a5957b4 SHA-256: b93b7d816411f9ba3085a3aba3eb6e4985c34f65c941fd52ddecf2e3efac7046
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The document body and extracted URLs indicate a lure for free Robux, likely a phishing or malware distribution attempt. The presence of an external URI and the ML classifier's high confidence score suggest malicious intent. The document's content and associated URLs point towards a scam designed to trick users into downloading a payload.

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/get-free-robux-with-javascript-and-raw-paste-game-hack PDF link annotation
    • http://library.ft.upnvj.ac.id/repository/money-hack-the-plaza-roblox_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/hacks-de-roblox-para-teletransportarse_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/gift-card-free-online-roblox_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/how-to-get-free-robux-no-hacks-gliches-or-troll_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/roblox-infinite-jump-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coin-master-34-5-hack_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/boku-no-roblox-hack-cash_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/how-to-get-frozen-hair-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/a-cheat-engine-67-do-roblox-aim-bot_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-spins-coin-master-cheat_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_off00003035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3035 22064 bytes
SHA-256: b37db3ecbb91bbcb2769dfa479f12e2718c3a971cf57c715cc18c5c4e388a9c5
font_01_sfnt_off00006112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6112 20252 bytes
SHA-256: 0a8233ab5d669f695a81e92b8efde5fc40a98b328028eb058848c12ac1b5610b

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