Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db00fc406081269…

MALICIOUS

PDF

87.8 KB Created: 2020-11-24 19:48:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: af9540e9681e048c99df72d9f5d38d56 SHA-1: 62967fb4d067062d507f40b47ae9363caac23506 SHA-256: 0db00fc406081269c0bf1ffaec0ff62bac2c84a90e66a0587fee5119953a9875
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 0.9994

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=the+dark+soul+ds3 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375908/normal_5faa23a8195e7.pdfIn PDF document text
    • https://wutawodasigupo.weebly.com/uploads/1/3/4/5/134512212/81f992f5.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/1d1f8ecc085ca.pdfIn PDF document text
    • https://jevalibiku.weebly.com/uploads/1/3/4/2/134266190/1667651.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389793/normal_5fb5083a82ca7.pdfIn PDF document text
    • https://livadasim.weebly.com/uploads/1/3/4/3/134312527/533a8.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/jepinebawo/spring_framework_5._1._5.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/dunokap.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/lds_conference_october_2019_changes.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/buku_agama_islam_kelas_11_kurikulum_2013_smk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D68 3840 bytes
SHA-256: ac0ca0dda44a4c5bae011f8c95821259630b3b4d3bf4d016193d198e1344eeb4
font_01_sfnt_off00011b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1F 5092 bytes
SHA-256: 21e4b87fead0e85e3bbf54bbf39ac12ef4c30e996591bb046cf9b883f8cf7844
font_02_sfnt_off00012c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C67 11248 bytes
SHA-256: 981afefa537fd52b9920f5becd6175db955f9e1dc37aa288fe0060e3ec5e4be7