Malicious PDF — malware analysis report

Static analysis result for SHA-256 b957ef03216d7e56…

MALICIOUS

PDF

33.3 KB Created: 2021-06-19 15:55:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e8ba0526a4384213e303bbce8f045c38 SHA-1: 14a81f905ca7cba23f2eaf4ebd531ad227dde501 SHA-256: b957ef03216d7e56a1a26538d7999b39bd5ea4ebcae132133beb89e76e1b0d2a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded links, many of which are SEO-optimized and point to sites offering 'free Robux' or similar game-related cheats. The ML classifier strongly flagged this PDF as malicious, and the presence of a 'download button' heuristic suggests a lure to click these links. The primary intent appears to be directing users to scam or potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/what-games-to-play-on-roblox-to-get-free-robux-game-hack PDF link annotation
    • http://initiatiev.nl/images/free-robux-hack-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://initiatiev.nl/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://initiatiev.nl/images/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://initiatiev.nl/images/how-to-get-verified-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://initiatiev.nl/images/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://initiatiev.nl/images/free-robux-with-credit-card_GM431946152.pdfIn PDF document text
    • http://initiatiev.nl/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://initiatiev.nl/images/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://initiatiev.nl/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://initiatiev.nl/images/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://initiatiev.nl/images/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • http://initiatiev.nl/images/coin-master-official-fan-page_GM406889139.pdfIn PDF document text
    • http://initiatiev.nl/images/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://initiatiev.nl/images/minecraft-apk-download-v1-144-2-free_GM479516143.pdfIn PDF document text
    • http://initiatiev.nl/images/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://initiatiev.nl/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://initiatiev.nl/images/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://initiatiev.nl/images/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://initiatiev.nl/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://initiatiev.nl/images/hacks-to-get-free-robux_GM431946152.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_off00002a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A51 22220 bytes
SHA-256: 19806e396871d1faaac66124a0907fa4f3ecb1260fb2da1d7be118fe82c2ace5
font_01_sfnt_off00005b9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9B 19668 bytes
SHA-256: 49499069412486418906312b2ad1735dcf59b877d56bc85d6c3ddf5d1c13245a

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