Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5dca12c85f77600…

MALICIOUS

PDF

35.1 KB Created: 2021-07-04 02:05:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 879957d6fad5fb5a45d11a081ef09630 SHA-1: 80494681e8c89fd5df311c5302dfc887eee846d4 SHA-256: b5dca12c85f77600e5bad64cd4b71cdbe21b4a8667d34e0a67adfc1e39c7ba94
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links, many of which are SEO-optimized to appear as legitimate resources for game hacks and cheats. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' lure further supports a malicious intent. The primary goal appears to be directing users to external sites that likely host malware or phishing content.

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.tw/app/406889139/coin-master-gold-cards-hack-game-hack
    • http://opac.akafarma-aceh.ac.id/repository/vechil-simulator-money-hack-roblox_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-hack-dantdm-roblox_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/roblox-hack-clothes_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-tix-in-roblox-pokemon-brick-bronze_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-promo-codes-roblox_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/daily-free-spin-link-in-coin-master_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-coins-on-tiktok_GM835599320.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdf
    • http://opac.akafarma-aceh.ac.id/repository/pubg-uc-price-list_GM1330123889.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-spins-coin-master-2021-today_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-a-free-minecraft-server_GM479516143.pdf
    • http://opac.akafarma-aceh.ac.id/repository/esp-hack-roblox-counter-blox_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/hacks-for-saob-roblox_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-now_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-roblox-hack_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-apk-hack-2021-ios_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/roblox-mm2-free-knife-codes_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/roblox-free-draw-tutorial_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-roblox-cat-ears_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000322c.bin
b27007fbb925b5e8ef394bf575a5b1ef0da1fe6bfbb0846eb867fe7e3541f393		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x322C 23220 bytes
font_01_sfnt_off00006685.bin
86d208c87cd9723521760f39289724e0803f9f68e91a8c51082ac7ab23afa3dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6685 18252 bytes

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