Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc3f5758211e21fa…

MALICIOUS

PDF

76.1 KB Created: 2020-11-29 11:24:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: cef02eda6ef9486f35423afd8b100e97 SHA-1: 2ebc9714b6ba8f8274b9e72d5c6616927d4acae5 SHA-256: fc3f5758211e21fa046c350ba280191189d21e1d7747b5a1430068c1b0b829d5
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 0.9997

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=skyrim+change+appearance+xbox+one PDF link annotation
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/medodetanezi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383147/normal_5fb4517f6a0e5.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/zavilu_kalajotokoreb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384822/normal_5fb68f2f8049b.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/tezofuretejom/71949974229.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/hike_to_lake_aloha.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/dd_restaurant_logo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c518349-55c5-446f-bf47-67dfaa566056/49023330390.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/adhyathma_ramayanam_kilippattu.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/tiwezobowax.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_off0000eaab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAB 5612 bytes
SHA-256: d39ffa556bb205acd1793ac4cb241522ba76235be1deed522d63a84d316a7b94
font_01_sfnt_off0000fdaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAF 11420 bytes
SHA-256: 4a8c3912725553ac8c2a0cc20a67506378157795f4dcdb8406a02520a9e1dfbc