Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5ac7f31ff5b3819…

MALICIOUS

PDF

35.6 KB Created: 2021-06-20 04:15:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3fb2333c53d250797e95172692cba7b3 SHA-1: 61671c573e0a265f2e0242fd1eb2b66f1372d0c9 SHA-256: b5ac7f31ff5b38196de5738fcb8556a8e747bd8d2aab344fd3a5144fd1e7ceae
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that explicitly advertises "hacks" and "cheats" for popular games. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, suggesting a link farm designed to attract users searching for game exploits. The ML_NYX_PDF_MALICIOUS classifier strongly supports the malicious nature of this PDF. The primary attack pattern involves luring users to download potentially harmful files from the listed URLs.

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/roblox-vehicle-simulator-money-hack-2021-game-hack PDF link annotation
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-get-free-robux-inspect-element-2021_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/roblox-hack_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-coin-master-spins-daily_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_off000031ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31EE 21976 bytes
SHA-256: 866219d43276cc3f3a1329e419fce0e9875b96906b0fdd58555577bd99c0f84e
font_01_sfnt_off0000627f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x627F 20356 bytes
SHA-256: f84ecd9a8748aee0545b22c0106a29131a697076228218cd255279e1c93d1d17

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