Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ceb16c7b0dd7aa6…

MALICIOUS

PDF

37.6 KB Created: 2021-06-19 17:50:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 536e3f56952fa684f341091e2bc38ffe SHA-1: 1ec30afc7e94c22526f5e9110adfc80d445959ee SHA-256: 4ceb16c7b0dd7aa692531ffb32fab53e84302b542c1b3ac9d3febcbb3aaa3476
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded URLs and a call-to-action phrase, strongly suggesting a phishing or malware distribution attempt. The document body and extracted URLs promote 'free Robux' and 'free spins', common lures for tricking users into downloading malicious files or visiting compromised sites. The ML classifier and PDF link farm heuristics further indicate malicious intent.

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/free-robux-no-saving-site-youtube.com-game-hack PDF link annotation
    • http://opac.akafarma-aceh.ac.id/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-do-you-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/hack-noclip-roblox-2021_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/hack-account-of-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-the-scary-elevator-red-key-locations-cheat-sheet_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-hack-link-2021_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-any-simulator-infinite-money-hack_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-free-robux-hack-mobile_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-links-to-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/lego-hacking-descargar-hack-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-top_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-recover-a-hacked-roblox-account-without-email_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/case-clicker-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/new-free-spins-coin-master_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_off00003b0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B0F 22372 bytes
SHA-256: 76f1ac2f1db641fe3f11cf3d6bddca90961bc2bf7ba31c93057b6823e094c132
font_01_sfnt_off00006cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD7 19544 bytes
SHA-256: 015f52663d21ec849b3b54683dfe16d58b89120cd43241409a5e037a8f4f8b09

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