Malicious PDF — malware analysis report

Static analysis result for SHA-256 359905ae1be624e8…

MALICIOUS

PDF

34.9 KB Created: 2021-06-19 18:09:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1cd23efdfbaeee5840a0e43063f5d91d SHA-1: d5f89c82462746379804548af20a44b34f2549b1 SHA-256: 359905ae1be624e8d24e37d3e82a9ff9b1e3d4e128b047de66e295dc229090a8
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains a large number of external links, many of which are structured as SEO-optimized PDF gateways. The document body and extracted URLs suggest a lure related to free in-game items and currency for platforms like Roblox and Coin Master. The ML classifier and PDF link farm heuristics strongly indicate malicious intent, likely to direct users to scam or phishing sites.

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/is-there-a-free-coding-platform-for-roblox-game-hack PDF link annotation
    • http://ofthalmiatrosthess.gr/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/free-robux-android_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/pokemon-go-free-weekly-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/how-to-get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/is-getting-free-robux-real_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/hacks-to-insert-in-roblox-console_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/commenbt-hacker-un-compte-roblox-facile_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/free-codes-to-get-robux_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/how-to-sell-roblox-shirts-for-free_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/free-costume-roblox_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/free-robux-hack-pc-2021_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/roblox-white-hat-hacker_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/coin-master-free-spins-youthnow_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_off00003067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3067 22312 bytes
SHA-256: aa220d151dd2332911991c1fb91611526f795a5603689c98d6c3412fdbab591c
font_01_sfnt_off00006216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6216 19628 bytes
SHA-256: 237a25dc726ea858df695a4004244ed55308880d75b69a54faa36ec5b19590b4

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