Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a0a663d7e4db08e…

MALICIOUS

PDF

60.7 KB Created: 2020-11-19 06:03:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 46b52037a1a8369b470c38b9478cbe96 SHA-1: 1fd59d9f69209cd4f1287a1fe4928d5073b5925b SHA-256: 2a0a663d7e4db08e5cf7db045ccda08a35bd53b0b7a9e8947a0992236a514a56
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/123?utm_term=fdg+half+life+calculator PDF link annotation
    • https://galojegada.weebly.com/uploads/1/3/4/3/134364802/8296719.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374536/normal_5f8f6381a44e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377125/normal_5fab93366085f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425768/normal_5f98a5eb76975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370987/normal_5f88cd063e4a0.pdfIn PDF document text
    • https://ganarusi.weebly.com/uploads/1/3/4/1/134109047/5950913.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403938/normal_5f988ff2ea480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368975/normal_5f89585394593.pdfIn PDF document text
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/3d7af44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bc1afe7-373c-4cba-b5dd-cb84200841fc/rwby_arslan_x_ruby_fanfiction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8be6ae26-73d2-4d39-8096-1fbcd2bca7e1/misavojo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faff0331-ca8a-4132-83ca-1bd176bd6bf5/fekemafakena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11f394ff-6c81-4d60-9b70-76531fd846e9/libukajenivonebula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f692e76-c2e5-4d72-ba9c-f54dbc74793c/77058208252.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67e45a69-0618-45c5-be7d-2012a3ecbb03/40366751696.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2F3 5060 bytes
SHA-256: d89bba53fc40ce6cead7fdff28ebe97e56e2c4b3895756afa2493fe04c0e2473
font_01_sfnt_off0000c42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC42C 9844 bytes
SHA-256: aba38637ac83dc09c13fc9ddd628e130a3985416e22c57f94a617a8bfc31873b

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