Malicious PDF — malware analysis report

Static analysis result for SHA-256 098160066f77973b…

MALICIOUS

PDF

45.4 KB Created: 2021-05-14 00:35:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3fdaec5e0c3fc11599416cfd7ad470f5 SHA-1: 70c91bb63b662df40a036186f9de7f8e774b5c4a SHA-256: 098160066f77973bb77ca8a2613aa8ddf3d09cc68f5b802ae85e5a43b07c05d1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which point to websites offering game-related cheats or currency, suggesting a scam or phishing attempt. The presence of a link farm heuristic further supports this, indicating a large number of external links designed to direct users to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/431946152/how-to-get-free-robux-website-game-hack PDF link annotation
    • http://optsuvenir.by/images/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://optsuvenir.by/images/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • http://optsuvenir.by/images/coin-master-hack-2021-iphone_GM406889139.pdfIn PDF document text
    • http://optsuvenir.by/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://optsuvenir.by/images/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://optsuvenir.by/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://optsuvenir.by/images/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • http://optsuvenir.by/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://optsuvenir.by/images/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://optsuvenir.by/images/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://optsuvenir.by/images/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://optsuvenir.by/images/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • http://optsuvenir.by/images/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://optsuvenir.by/images/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://optsuvenir.by/images/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://optsuvenir.by/images/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://optsuvenir.by/images/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://optsuvenir.by/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://optsuvenir.by/images/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • http://optsuvenir.by/images/coin-master-get-free-cards_GM406889139.pdfIn 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
font_00_sfnt_off000048a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48A7 26172 bytes
SHA-256: 292ffed4c1eb20ab2a62470aeb40f26054f49812af86d2284d79dec81ba49c55
font_01_sfnt_off00008440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8440 2836 bytes
SHA-256: fd98c8f6e7c2e74bbd5822409159a93ac5c94da083ae4c2eb269d4284375f9e8
font_02_sfnt_off00008de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE6 18600 bytes
SHA-256: ac0d4502235c23175446595a7cf8e817a77a023a22f0524dfc344b6b051bbd29

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