Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbdf7c6eefc5e1e0…

MALICIOUS

PDF

42.1 KB Created: 2021-05-17 13:12:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 27c02d9e458f8ea258194d48a618cc53 SHA-1: 30338b7faa3b03462caab63e180844bc160ca8a1 SHA-256: bbdf7c6eefc5e1e0992b93e2b91b62f6e8d153f7bbd8f7c271170b6f255f17bb
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to websites that offer cheats and free items for mobile games like Coin Master and Roblox. The ML_NYX_PDF_MALICIOUS heuristic also flagged the document with high confidence. The presence of a call-to-action phrase suggests a user-driven interaction to navigate to these potentially malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-2021-free-spins-link-game-hack PDF link annotation
    • http://londiniumcentre.com/images/get-free-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-cards_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://londiniumcentre.com/images/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-hack-spins-app_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://londiniumcentre.com/images/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-game-2021-free-spin-link_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://londiniumcentre.com/images/how-to-get-free-robux-fast_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
stream_003_off00004825.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4825 24828 bytes
SHA-256: 712dee4c1dbe3950f27a2200875af5c7c68ef5b085a13f26e04c597734d5d6b1
font_01_sfnt_off0000816e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x816E 18456 bytes
SHA-256: b370a5eafdfb7958c61f4fc883d4c28be8b0b06276da4480d394e4923f22f18f

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