Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0602795cd30610c…

MALICIOUS

PDF

66.5 KB Created: 2020-11-16 16:28:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a03e71d84b0b04777f286350ecac4da6 SHA-1: 90628996eda00c31bde4f52dcd2de9f288a89602 SHA-256: c0602795cd30610c2f2ef0a6fa058be5e7e7a48d52799d0f9b20c6d8df5a9e3d
156 Risk Score

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 0.9980

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://traffnew.ru/strik?utm_term=when+i+fall+in+love+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404308/normal_5f92a75b69760.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/9d013.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/547bf059-00fc-4dec-a80c-f99632af8180/wabufupinifanemizolog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae39c33e-45ad-4a7a-9906-33498c0969b4/haynes_automotive_repair_manuals_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16822548-ce20-462d-9938-adf782102701/overnight_sensation_mtm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/054bfae4-5b88-4999-b83e-907544409bde/kubirura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1fa568f-a742-4d9a-88a1-a7a94e1c1f15/12346586983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9b55256-056b-4587-91ab-7404991596cf/73203073323.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/what_are_the_sat_dates_2019_to_2020.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_off0000ca22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA22 4928 bytes
SHA-256: a09cc55a71e3dee39dbb1539a4c0efd13961906ea9b9805eb2afc4dd4bf24ee3
font_01_sfnt_off0000dafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFE 10216 bytes
SHA-256: 3d1bfdf15f563cc61bbe45d9a1e29bfef52ddffed77cf5b131cc7f6b7409554b