Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea7d104454fbd82…

MALICIOUS

PDF

45.2 KB Created: 2021-06-08 08:50:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1262a2f146da2de848f35ac99df6f90a SHA-1: 91b8a3a544b0daf10bec7314746a4aca1e69a6bc SHA-256: fea7d104454fbd821aeccf378917016539e74e23658c9e71fab5974a972bf1bb
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded URLs that point to websites likely involved in SEO spam or distributing malicious content, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to potentially harmful sites, possibly disguised as free game hacks or similar lures.

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/emoji-puppy-tshit-roblox-free-game-hack PDF link annotation
    • http://digilib.iailm.ac.id/repository/are-tiktok-free-views-hack_GM835599320.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/grabpoints-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/best-free-robux-sites_GM431946152.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/coin-master-tiradas-gratis_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-village-4_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
stream_004_off00004fa3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FA3 27688 bytes
SHA-256: 48624da280c246db127aaae146deb0c605ba35950971c7a046ef63621c5cabf3
font_01_sfnt_off00008ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE4 19436 bytes
SHA-256: e5aab9fabeb28c46cb50c6cc8ad3ea4697ad5baa583ac8a815382129914aa5b8

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