Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a7b1a6e27953dcb…

MALICIOUS

PDF

32.9 KB Created: 2021-07-20 18:35:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 568c0e4ef17af7d75c678b292bb9b32a SHA-1: ae0b349ac1680dd4147954151293aa8788bc3cf9 SHA-256: 4a7b1a6e27953dcb4e8ab1f9b72e241e818f8671ab9b7f0c95fd83fd6635c6eb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains embedded links and a call-to-action for "Roblox Hacks 2021", impersonating a popular game to lure users. The primary malicious link redirects to a suspicious domain, likely serving as a lure for credential phishing or to download further malicious content. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

Heuristics 4

  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.tw/app/431946152/roblox-hacks-2021-game-hack.
  • 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/roblox-hacks-2021-game-hack PDF link annotation
    • https://kimolos-link.gr/images/minecraft-free-version_GM479516143.pdfIn PDF document text
    • https://kimolos-link.gr/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://kimolos-link.gr/images/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • https://kimolos-link.gr/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • https://kimolos-link.gr/images/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://kimolos-link.gr/images/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://kimolos-link.gr/images/get-free-robux-2021_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_off00002947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2947 22972 bytes
SHA-256: af2da2942c8606c09309360c1550ade4c08f633a79966a9cb9785929333f9837
font_01_sfnt_off00005cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB6 18772 bytes
SHA-256: f404702c6ebb54461c96635651d1cc1e8daf221ec2b2a1d14d4d71b0dc657f1c

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