Malicious PDF — malware analysis report

Static analysis result for SHA-256 5024c74e88cd0281…

MALICIOUS

PDF

37.8 KB Created: 2021-07-08 16:31:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fa124e8c8258a3b38bffd9949c9e28a9 SHA-1: 3b53c57116f7cce3b2a7354ce6b99891d626677c SHA-256: 5024c74e88cd0281a07a1d7eda6e4de4710cb8f97f43669042d984eaf90e5967
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which appear to be part of an SEO link farm, suggesting a deceptive purpose. The document body and extracted URLs indicate a lure related to game hacks and free items, likely to drive traffic to malicious or spam sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.tw/app/406889139/free-spin-link-in-coin-master-game-hack
    • http://www.repion.com/uploaded_files/userfiles/files/levvvel-coin-master_GM406889139.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/flame-gg-hack-roblox_GM431946152.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/roblox-admin-hack-v3rmillion_GM431946152.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/free-robux-generator-no-human-verification_GM431946152.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/wahoo-gaming-co-free-robux_GM431946152.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/free-robux-gift-card-codes-2021-not-used-england_GM431946152.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/boostgamesnet-roblox-free_GM431946152.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/coin-master-free-spins-coins_GM406889139.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/roblox-change-name-free-pastbin_GM431946152.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/outil-script-mad-city-roblox-hack_GM431946152.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/easy-how-to-get-free-robux_GM431946152.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/free-minecraft-survival-server_GM479516143.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/roblox-free-knives_GM431946152.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/free-spins-coin-master-links-blogspot_GM406889139.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/roblox-com-free-robux_GM431946152.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdf
    • http://www.repion.com/uploaded_files/userfiles/files/how-do-u-see-if-u-r-hacked-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003c05.bin
5aae74066295f2c060375765cd82df6608867433b581d6a655dc39f434c69be2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3C05 23440 bytes
font_01_sfnt_off0000710c.bin
d3e962bcabbb5ef935488ecc7aa9e5e3fb65918ede879eb88a760949ba3de850		 pdf-font-stream PDF embedded font (sfnt) at offset 0x710C 18344 bytes

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