Malicious PDF — malware analysis report

Static analysis result for SHA-256 05cfd300a72d338c…

MALICIOUS

PDF

45.5 KB Created: 2021-06-11 08:29:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e435b9ff5aa07f027929ced05344faa4 SHA-1: b632e8bef1ca2151a9994e3cc035e51ef2762c3a SHA-256: 05cfd300a72d338ca0541d2586f53037c7173d7ca706cde21de7f5c51ba8d5aa
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a malicious lure, employing a link farm of SEO-optimized PDFs to direct users to potentially harmful content. The document body and extracted URLs suggest a theme of game cheats and hacks, a common pretext for distributing malware. While no scripts were directly extracted, the PDF structure and extensive external linking strongly indicate an attempt to drive users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/roblox-the-conquerers-cheat-engine-game-hack PDF link annotation
    • http://perpus.stihpada.ac.id/repository/free-robux-without-human-verification-on-android_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/adopt-me-roblox-hack-money-free-youtube_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/alfheim-online-free-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/spinuri-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/coin-master-free-daily-spins-today_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_off0000510b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x510B 26508 bytes
SHA-256: 9925af5c42359eed7436ccf09fd3a35ca9cd3ff32f952052be257ce5fe75c5a4
font_01_sfnt_off00008d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D26 19000 bytes
SHA-256: 6af387f2f458e0ed161d0d546cfe9a5909de1219fafa5fb016e8ea98ae7ceded

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