Malicious PDF — malware analysis report

Static analysis result for SHA-256 20ddaae36ba3df58…

MALICIOUS

PDF

65.5 KB Created: 2020-11-20 08:08:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 2cccce619854aa21ec5af7c44bcfe957 SHA-1: d39d681a5a5ddf9d9998a8e4dead70795d79e94d SHA-256: 20ddaae36ba3df58f2afa60c9627ddf5a9c06a5e4ae09edac3d9a23fd99e5f4b
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://trafftec.ru/strik?utm_term=manufacturing+process+flow+chart+template+xls PDF link annotation
    • https://sejabekozifox.weebly.com/uploads/1/3/4/2/134266090/vefaja.pdfIn PDF document text
    • https://raxuzorufureraw.weebly.com/uploads/1/3/0/7/130775378/7078940.pdfIn PDF document text
    • https://gitojigobireko.weebly.com/uploads/1/3/4/5/134517815/c32e9aa541.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/65da7f83-47e2-4f96-97c6-de67d5f25495/ffa_official_dress_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9bd7cfd-8732-4ba4-962b-e6e814811a92/vcarve_pro_8._5.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/the_seventh_man_story_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/adobe_photoshop_7._0_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/environmental_impact_assessment_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ad6641e-6e87-42da-9ecd-281dfe1f906f/52940926123.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/mufizesizuneje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56087e51-4049-4841-9b95-c0257acf3a6d/banuwad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/132dc467-2d64-478c-82d7-4a747141711b/powumi.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_off0000c5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5AC 5596 bytes
SHA-256: faeafbff3057539c5b403d060506f4997c6d0171f10c7a105f0fbda551104122
font_01_sfnt_off0000d8af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AF 9412 bytes
SHA-256: a453a26802d1e0d462667e6077d18650264605526c81751b2d7c2a97bac23435

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