Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bda7e058ddbf99a…

MALICIOUS

PDF

49.0 KB Created: 2020-11-26 03:22:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf5722a2961558304bd50d358c51b179 SHA-1: b57170ef0ee9c0d0779f553a19984efe478c2614 SHA-256: 4bda7e058ddbf99a34a8bddf9d36212a90eb1e49c561fd062e42b4ea435bafed
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical of phishing attacks. It contains an external URI pointing to a suspicious domain, which is likely part of a credential harvesting scheme. The presence of numerous external links, including a link farm, further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6160

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 48 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://trafficel.ru/strik?utm_term=njit+honors+acceptance+rate
    • https://cdn-cms.f-static.net/uploads/4383471/normal_5f9466f488a5b.pdf
    • https://cdn-cms.f-static.net/uploads/4386330/normal_5f8fbbf3e9ddd.pdf
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/filosom-lusiwikafese-jerupuxorukoti-novubolifunuw.pdf
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f86f8315c646.pdf
    • https://korenumotijele.weebly.com/uploads/1/3/4/6/134687452/d9e6a88d8f.pdf
    • https://uploads.strikinglycdn.com/files/fca08757-da87-49d9-ade0-b6a03558009d/12147270104.pdf
    • https://uploads.strikinglycdn.com/files/78e5d852-6f11-4acf-a3b8-1ede7c1df8e4/vomerirozewudopedunudasuz.pdf
    • https://uploads.strikinglycdn.com/files/97d34c08-e214-4618-b87e-48061a781b35/fufuzosakiwuv.pdf
    • https://uploads.strikinglycdn.com/files/4fa3b193-02b1-45fa-a24e-16aa4411f277/58090534597.pdf
    • https://uploads.strikinglycdn.com/files/5a2542da-dce4-432c-8ade-dc71ee9faec7/976893749.pdf
    • https://uploads.strikinglycdn.com/files/8f117916-553a-40a7-828e-812421d4cb63/nj_state_sales_tax_calculator_2020.pdf

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