Malicious PDF — malware analysis report

Static analysis result for SHA-256 985b56f30c92ef43…

MALICIOUS

PDF

45.8 KB Created: 2021-06-03 12:14:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 445ef1d0342e8877d60da210c2e53774 SHA-1: 618d636a491443835a88fd7a26213c7612d8a00c SHA-256: 985b56f30c92ef43f9c4c32534d09dc2279bab7374d6ff97aaf8a122ae1ec1b7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links, including one to 'netcdn.online', which is flagged as a potential malicious URL. The document body, though heavily obfuscated, contains text related to 'Free Spins Coin Master' and a URL that suggests a lure for a game hack. The presence of a PDF URI heuristic and a high ML classifier score indicates malicious intent, likely to redirect users to a site that may host malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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.online/app/406889139/get-free-spins-coin-master-game-hack PDF link annotation
    • http://digilib.iailm.ac.id/repository/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-food_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/get-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-spins-generator-no-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-32-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f05.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F05 24548 bytes
SHA-256: 2d54a0c939fae55602ec4c1a4b24d71071bd6e710027b3b277dcb24e3e64a115
font_01_sfnt_off00008787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8787 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off00009172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9172 17884 bytes
SHA-256: b0210710b9f532dde69bab3e54691bd54d84b0d7d990975f20826afd1ba27450

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