Malicious PDF — malware analysis report

Static analysis result for SHA-256 614e121eae501158…

MALICIOUS

PDF

34.2 KB Created: 2021-06-22 09:42:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ac31c1fdb08f34ae83bf88ae1cc5340e SHA-1: 5554e66f351c252cdfdc788e9b3932d76c9e418e SHA-256: 614e121eae501158cdd765fb15dccc9b9f35e740a327ab426f0304da96d09399
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that form a link farm, predominantly related to game hacks and cheats for platforms like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to drive traffic or distribute malicious content. The presence of a download button lure and the ML classifier's high confidence score further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/hacker-avatar-roblox-game-hack PDF link annotation
    • http://msfs-eastafrica.com/images/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/roblox-restaurant-tycoon-diamond-hack_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/roblox-robux-hack-no-survey_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/how-to-make-t-shirts-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/how-to-hack-roblox-with-brutis_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/roblox-icebreaker-hack_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/roblox-free-version_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/hackaron-robux_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-roblox-accounts-v3rm_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/roblox-data-breach_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_off00002f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F16 22420 bytes
SHA-256: e080c1ac3e783df64ab97d8e2ddbe04fc6f5aba9926895eefd4c9167b9462749
font_01_sfnt_off00006108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6108 18876 bytes
SHA-256: cd103be55c1210f4c4986025d2ffd5772ae501a15aa78632277cb31d48d3646c

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