Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b13db9e8c64f079…

MALICIOUS

PDF

35.0 KB Created: 2021-06-20 12:59:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2d5b57ca838f8171d0f7cb027d5d2f34 SHA-1: 4e5e1956d9a8219b314d9777b8dfc0853a0f21cb SHA-256: 0b13db9e8c64f07954093d5507a416de95fd98e57d71659dc10cb46e0d8449b7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/flame.gg-hack-robux-game-hack PDF link annotation
    • http://perpus.wdh.ac.id//repository/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-no-download-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/getrobux-info_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/get-robux-now_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-make-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/legit-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-zamasu-dbn-prealpha-hack_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000321f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321F 22092 bytes
SHA-256: b14f405abe0e2516b6a470375e9991a441a8224f3c8bfa1953531c50c8aa637b
font_01_sfnt_off0000630c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x630C 19288 bytes
SHA-256: 66541b7cb4c32f2ca59a2d518b9ebe65ae806d5faf6a3cdf0f1ceb7b39b5e7b3

Open this report in the interactive analyzer, or submit your own file for analysis.