Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d8b2ec0086c1f9…

MALICIOUS

PDF

41.7 KB Created: 2021-05-12 03:11:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a2726c8648e3b77378cd67497027c703 SHA-1: 2f17580699157744d8a1f93249539f4b72e36e80 SHA-256: e0d8b2ec0086c1f93ba4d95d48b6ffacd2f5cc0a6ef5e2d89315c623414d6063
122 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDF files hosted on the IP address 118.174.0.244. This behavior is indicative of a link farm or a method to distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/how-to-create-group-in-coin-master-free-spins-game-hack PDF link annotation
    • http://118.174.0.244/UserFiles/File/www-free-robux-com_GM431946152.pdfPDF link annotation
    • http://118.174.0.244/UserFiles/File/free-spin-link-of-coin-master_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/unlimited-spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/can-you-actually-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
stream_003_off00004b14.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B14 23640 bytes
SHA-256: 0e3d23d3f9623cf5cd6416c3fef6a054ae3c73862f99e878d7450e6b45d295c2
font_01_sfnt_off000080bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80BB 18188 bytes
SHA-256: 214f541c49ef2ca421d67462486d7476b6aace0078e47079ad7f1e2427fd8839

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