Malicious PDF — malware analysis report

Static analysis result for SHA-256 66538aecf044a3d6…

MALICIOUS

PDF

69.6 KB Created: 2020-11-17 00:04:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3c4dcdb6def473c442ea0fa418ed9ce1 SHA-1: b3ecfb6abf32b366d4af247de43dca745421c641 SHA-256: 66538aecf044a3d6dd2d4f933dbdb3e807d6cc90d60859995312f36bdc9a65af
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or malware download.

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=dvd+recorder+with+hard+drive+and+dvd+burner PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378834/normal_5f92a97337a41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406501/normal_5fa39252ef286.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411923/normal_5fad6b57e318d.pdfIn PDF document text
    • https://zozovuxogufeduw.weebly.com/uploads/1/3/4/7/134766710/0ebf7b4e561.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407988/normal_5fac1fd65618c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380379/normal_5fa29677506a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373511/normal_5f8c9178d7af5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374362/normal_5f9249c4a64c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381294/normal_5f957ee32ff67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405903/normal_5f9546cbeb276.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/zekuxukikibefon.pdfIn PDF document text
    • https://s3.amazonaws.com/tugumeb/61908724028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74af659b-e86c-49da-8658-ccc731a70069/babevitavuligijo.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/seleji.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_off0000d442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD442 5108 bytes
SHA-256: 28a606a986d2d40c3a15defc19ab53a816978dce09da8c4073969b58b004ac65
font_01_sfnt_off0000e5b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B6 10396 bytes
SHA-256: 3f1da801efd51b745db71f8c8d19593fd2a4a1053608a320239868819ba63e90

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