Malicious PDF — malware analysis report

Static analysis result for SHA-256 372abee3046b273e…

MALICIOUS

PDF

66.6 KB Created: 2021-01-02 12:17:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b50ba15fc58560843bbf3ac2c63ff730 SHA-1: 5a04f28f4f6473e772ef92a9075fec6d9e28e48b SHA-256: 372abee3046b273ee6044c93d187e101680133abc13c7ebe0442307e4403b529
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to PDF files hosted on link farm services like Weebly and S123-cdn-static.com. This behavior is indicative of SEO manipulation or a phishing campaign designed to drive traffic to malicious sites. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9065

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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/aws?utm_term=parallel+and+antiparallel+beta+sheets+difference
    • https://tuwavufubuxa.weebly.com/uploads/1/3/3/9/133997694/xijulubibudifupaxuxo.pdf
    • https://static.s123-cdn-static.com/uploads/4480893/normal_5fcbac163263f.pdf
    • https://vuvitujenus.weebly.com/uploads/1/3/4/3/134305132/c6efff0277232b6.pdf
    • https://cdn-cms.f-static.net/uploads/4451212/normal_5fc1ac1d0360f.pdf
    • https://lavuzolitad.weebly.com/uploads/1/3/4/3/134327879/9937263.pdf
    • https://cdn-cms.f-static.net/uploads/4376602/normal_5fa71015546fe.pdf
    • https://zomutelisofo.weebly.com/uploads/1/3/4/7/134712892/df262173c7.pdf
    • https://cdn-cms.f-static.net/uploads/4485818/normal_5fd0e616a58d2.pdf
    • https://cdn-cms.f-static.net/uploads/4386365/normal_5f92e2b62cec1.pdf
    • https://static.s123-cdn-static.com/uploads/4470828/normal_5fefe43d34e95.pdf
    • https://zadobezaja.weebly.com/uploads/1/3/0/7/130775221/3041720.pdf
    • https://cdn.sqhk.co/girasufu/ifggjbL/fiwaduvewodizukigemedi.pdf
    • https://static.s123-cdn-static.com/uploads/4386087/normal_5ff02cb800219.pdf
    • https://lewibodozibepa.weebly.com/uploads/1/3/3/9/133997785/ee6c3367.pdf
    • https://uploads.strikinglycdn.com/files/31de7022-11d0-4618-b264-f9490b03da95/plug_panasonic_catalog.pdf
    • https://uploads.strikinglycdn.com/files/2c2ba3f2-39b0-4cfd-afa3-5042650a2221/vitodipisogevaf.pdf

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