Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5982aeab58bf659…

MALICIOUS

PDF

34.1 KB Created: 2021-07-01 11:27:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 642ce7128415dfaa65d5aba2cb6a3aa9 SHA-1: d3c693e4c6c8da597e26a9668a2b27fd6e890a68 SHA-256: c5982aeab58bf65941524ff2ece732936218419dd587df17e8316f376bde3a3a
62 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body that mimics game-related content, specifically for Roblox and Coin Master. The primary goal appears to be luring users to click on these links, which likely lead to malicious downloads or further phishing attempts. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

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/roblox-fan-free-games-game-hack PDF link annotation
    • http://www.callong.cn/uploaded_files/userfiles/files/how-to-get-free-robux-sign-up_GM431946152.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/tshirt-adidas-for-free-roblox-of-2021_GM431946152.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/roblox-booga-booga-spee-hack_GM431946152.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/free-roblox-items-2021_GM431946152.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/free-spins-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/pubg-uc-and-generator_GM1330123889.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/free-robux-generator-tool-download-link_GM431946152.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/best-fe-scripts-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/furky-safe-free-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://www.callong.cn/uploaded_files/userfiles/files/www-roblox-com-free-robux_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_off00002fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEE 22104 bytes
SHA-256: dfa2023b76924587f2b26737e92ca702dd8011587a84608cb4f8a229bb6f3a44
font_01_sfnt_off000060db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DB 18908 bytes
SHA-256: c2ac9fa1f2ab3d24a5ce03ca4f68f8ed7d9cfbbc0a0e7193bc858191fd15c2de

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