Malicious PDF — malware analysis report

Static analysis result for SHA-256 6958d523cb0b9acb…

MALICIOUS

PDF

36.2 KB Created: 2021-06-19 21:01:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5f705f5897942cfae8c9018f9a0e9fab SHA-1: c9a14be223d8773c3b56775159c7d79440ea5844 SHA-256: 6958d523cb0b9acb3984f4b7a10ce698a2ddf3702aed009d3c391c915e05d0e3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external resources, many of which are presented as 'free' game-related downloads or cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to drive traffic to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious, reinforcing the assessment that this document is part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/how-to-jump-hack-in-roblox-game-hack PDF link annotation
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/wurst-115-2_GM479516143.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-free-daily-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-roblox-toys_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/roblox-admin-hack-adopt-and-raise-a-cute-kid-download_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/how-to-hack-a-minecraft-server_GM479516143.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_off000033e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33E0 22896 bytes
SHA-256: 3cdfea9ffbd87d92b7ad50fdff2c338f8f09ee56c2fa5d0db1883efde2a3b32f
font_01_sfnt_off0000671b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x671B 19560 bytes
SHA-256: 83610502b75981e8742000e7ff901f7a5992dae50414577c463f613bb4ab0160