Malicious PDF — malware analysis report

Static analysis result for SHA-256 5598c0ec5dfe41ef…

MALICIOUS

PDF

34.4 KB Created: 2021-06-30 06:58:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1b59e963c686cca545e0b38d4c9d2117 SHA-1: 6c2dfc74bef82a71849bceb759ee37836701147a SHA-256: 5598c0ec5dfe41efd1b269f0dfd6ca9c8e3e59b2711acc632a09f45c8f331959
122 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are SEO-optimized and point to pages offering free Robux, game hacks, or other in-game currency. The document body and embedded links suggest a lure for users seeking free items in popular games, likely leading to malicious downloads or phishing sites. The ML classifier also strongly indicated maliciousness.

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/free-me-robux-game-hack PDF link annotation
    • http://www.reach360stock.com/uploaded_files/userfiles/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/free-roblox-acouts-full-with-robucks_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/roblox-weapons-hack_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/obby-for-free-robux-real_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/coin-master-free-400-spin-link_GM406889139.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/veil-roblox-exploit-free-download_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/hack-for-champion-simulator-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/artmoney-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/roblox-bloxburg-money-hack_GM431946152.pdfIn PDF document text
    • http://www.reach360stock.com/uploaded_files/userfiles/files/get-free-spins-on-coin-master-links_GM406889139.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_off00002f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6C 22504 bytes
SHA-256: 19866303d9da7fb0871ff7353646f486b8cecd4a4d78da87454875e8e49d35cd
font_01_sfnt_off000061dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DD 18912 bytes
SHA-256: 391e0a91f0e9a75b2e160fe42ce9add36521c9bc4d45f084a66e0520b0698e41

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