Malicious PDF — malware analysis report

Static analysis result for SHA-256 988526e8e46837aa…

MALICIOUS

PDF

35.2 KB Created: 2021-06-29 13:41:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d1f13f33ce5ae218a3ee44849673c854 SHA-1: 241d6ea2be40672fde941b99e07731ab96da3cd5 SHA-256: 988526e8e46837aab7371bf13e94bade0227c102dd3465848d509c04a6e5770e
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains numerous links to external resources, including a direct link to a potential executable download and a large number of PDF files hosted on sahebspices.com, many of which are related to game hacks and exploits. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an attempt to distribute malicious content or phish for credentials. No scripts were extracted, but the overall structure and content indicate a malicious intent to lure users into downloading harmful files.

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/dll-hack-for-roblox-2021-game-hack
    • https://www.sahebspices.com/uploaded_files/userfiles/files/free-account-roblox-with-robux_GM431946152.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/free-robux-hack-on-phone-no-human-verification_GM431946152.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/robux-hack-v6-5-mythical_GM431946152.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/how-to-get-free-robux-in-two-minutes_GM431946152.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/how-to-hack-coin-master-using-es-file_GM406889139.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/conqueror-3-roblox-hack_GM431946152.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/free-spins-coin-master-links-2021_GM406889139.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/roblox-hack-scripts-admin_GM431946152.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/free-roblox-gift-card-codes-not-used-2021_GM431946152.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/roblox-summoner-tycoon-hack_GM431946152.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/who-to-get-free-robux_GM431946152.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/hack-coin-master-apk-32_GM406889139.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/how-to-hack-coin-master-game-ios_GM406889139.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/how-to-get-2021202120212021-robux-for-free_GM431946152.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/easy-robux-generator_GM431946152.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/www-roblox-com-free-robux_GM431946152.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/coin-master-in-app-purchase-hack_GM406889139.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/free-coins-coin-master-blog_GM406889139.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • https://www.sahebspices.com/uploaded_files/userfiles/files/hack-de-robux-real_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030de.bin
6bab0bbcb1ef681856f6d69e5ef0805bfff6e19defc21cf3903a36446514f91a
pdf-font-stream PDF embedded font (sfnt) at offset 0x30DE 22576 bytes
font_01_sfnt_off00006382.bin
2dbfd8ff3f5a1de7cf6885cd0f00489477784533293ddb3536e2428b878358ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x6382 19388 bytes