Malicious PDF — malware analysis report

Static analysis result for SHA-256 339122df30a500c3…

MALICIOUS

PDF

33.1 KB Created: 2021-07-20 23:24:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bb2acf31021346336a16d5426f924dd0 SHA-1: 689ee51b01b43a869efac74121f672eabf2038b3 SHA-256: 339122df30a500c3f366ceef5b299bdec5f9fde3b75da468b7ec693fade716c4
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents itself as a 'Blox Land Free Robux' generator, containing multiple links to external websites that also promise free Robux or game hacks. The presence of a 'CLICK HERE TO ACCESS ROBUX GENERATOR' call-to-action button and the ML_NYX_PDF_MALICIOUS heuristic strongly indicate a malicious intent, likely a phishing or scam operation designed to trick users into visiting malicious sites. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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.tw/app/431946152/blox-land-free-robux-game-hack PDF link annotation
    • http://pescatun.es/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pescatun.es/images/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pescatun.es/images/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://pescatun.es/images/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://pescatun.es/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://pescatun.es/images/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://pescatun.es/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://pescatun.es/images/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • http://pescatun.es/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://pescatun.es/images/free-robux-generator-no-verification_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_off00002b66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B66 22720 bytes
SHA-256: 526c4a64831da060e503e9fad34a4474f39e6ca68a894b6a37e166c25baafbd0
font_01_sfnt_off00005e20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E20 18676 bytes
SHA-256: a7c13821684fc61eaa049fd43eee10516df39e364fb7cd2fb838e5b14a979614

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