Malicious PDF — malware analysis report

Static analysis result for SHA-256 3550109dbe067b9f…

MALICIOUS

PDF

63.7 KB Created: 2020-11-29 17:47:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ad21e060ec95714b942e518f37043c3b SHA-1: df9e7efd298e78b7e4b40e0fad0b7ba772df1180 SHA-256: 3550109dbe067b9ff0f100456844124f60b8e538512cd3dd703ffceb05c36ffe
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 0.9998

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://trafffe.ru/123?utm_term=bluedio+f2+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452386/normal_5faf7ef37019c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377371/normal_5f8b5de94cc94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373271/normal_5f89923e737d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_5f909f8b69b9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486745/normal_5fc336087cc63.pdfIn PDF document text
    • https://topejaliwas.weebly.com/uploads/1/3/4/3/134305960/2c2358b327.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379384/normal_5f8fe66bb05b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475582/normal_5fc1a5f19f4cc.pdfIn PDF document text
    • https://kukavixol.weebly.com/uploads/1/3/4/4/134485481/nodabiwebaz-korizose-fejobufaju-zafifelew.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/e886c53f-beda-49fd-a84a-2def26b7617f/eset_mobile_security_license_key_ebay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9495e71-d1ee-4058-beca-d42c2b61dc81/rubujulaloraro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bede233e-060a-4412-8082-10b877125db1/golej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eea8a2d9-bdc2-4f08-952b-1dacb2739ddd/34857238661.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_off0000bbb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBB2 5092 bytes
SHA-256: 3ea806e0be2969cd48a1cf9ebb4c153b692c686925c886d91ba876779bcf5e48
font_01_sfnt_off0000ccfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFB 11040 bytes
SHA-256: 37d999ed55fc77862f8d7e525f897ecbf55efea255bdfcea9d6cfd7276b6eb39

Open this report in the interactive analyzer, or submit your own file for analysis.