Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca42a239ca89eac8…

MALICIOUS

PDF

47.0 KB Created: 2021-06-04 03:04:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: dbeb8c127c92a3e6afc77644fcfd146e SHA-1: dbb22b53a87ff4b4ab8bc154c40e4cf361827948 SHA-256: ca42a239ca89eac84e4d8a589f4df727d89c5b7893fdc245ee344411333f1549
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which are SEO-optimized and point to pages related to game cheats and free currency. The ML classifier strongly indicated maliciousness, and the presence of numerous links suggests a link farm or phishing attempt. The document likely serves as a lure to direct users to malicious websites or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.online/app/431946152/how-to-get-hacks-on-roblox-mobile-2021-game-hack
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/free-robux-com-roblox_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/coin-master-free-fire_GM406889139.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-facebook_GM406889139.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/how-to-get-free-hair-on-roblox_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/how-can-i-get-free-robux_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/op-rewards-robux_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/free-coin-spin-coin-master_GM406889139.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/coin-master-golden-cards-hack_GM406889139.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/free-coins-for-coin-master-blogger_GM406889139.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/free-robux-co_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/roblox-studio-free-robux_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/how-to-become-famous-on-tiktok-free_GM835599320.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/make-free-robux_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/get-2021-free-spins-on-coin-master_GM406889139.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/coin-master-el-tiger-card-free_GM406889139.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-codes_GM431946152.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-new_GM406889139.pdf
    • http://elearning.man2-cms.sch.id/__statics/gudangsoal/files/hacks-para-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000512d.bin
da55d77513cfff44e4fdbe798218a3e12d9456290dbca9f5e879d20dead80dcb		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x512D 24268 bytes
font_01_sfnt_off000087f5.bin
fc50d3b60b7bea05908810d985fa0ebf2c795d0dc08be6e94fc6be5e11198773		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87F5 2864 bytes
font_02_sfnt_off000091d8.bin
9fffb03a04c8152a2e1024dfeb569fe6e285c87d720676a737f295b4afadd354		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91D8 19168 bytes

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