Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e8cbc34087b7e27…

MALICIOUS

PDF

35.2 KB Created: 2021-06-19 14:38:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e95fe743da487f15e913b9e2cfe25be4 SHA-1: b0ea95951db92bc6992e6ceb6de6594b49d3f7f4 SHA-256: 1e8cbc34087b7e27708227cbbd9ad69a6eea22f61837b2766499bc757fddd934
102 Risk Score

Malware Insights

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

The PDF document contains numerous links disguised as offers for free in-game currency and hacks, a common lure for phishing and malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the 'SE_DOWNLOAD_BUTTON' heuristic suggests a call-to-action to encourage clicks. The ML classifier also strongly flagged this PDF as malicious.

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.co/app/431946152/how-to-get-free-robux-no-waiting-2021-game-hack
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/get-free-robux-without-doing-anything_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/minecraft-hack-client-download_GM479516143.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-old-roblox-accounts_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/roblox-jailbreak-hack-download_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-hack-no-verification-no-signup_GM406889139.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-robux-ad_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-simple_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-spin-in-coin-master_GM406889139.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-free-spins-app_GM406889139.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-appsfor-coin-master-daily-rewards_GM406889139.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-get-hacks-on-roblox_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/easy-how-to-get-free-robux_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/50-free-spins-coin-master-links_GM406889139.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/www-robux-us_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-link-app_GM406889139.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-robux-real_GM431946152.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/free-spin-coin-master-instagram_GM406889139.pdf
    • https://elearning.mtsn1wonogiri.sch.id/__statics/gudangsoal/files/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032c1.bin
f7447d299dc8e87b973de2bcbafebb0069e1a35e99942c8d0f22295cab88bbf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32C1 21764 bytes
font_01_sfnt_off00006293.bin
7c67638a2dcd37cae2aa8df35b5f4a860ed068c7e5805ebd5916b07b173d207d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6293 19704 bytes

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