Malicious PDF — malware analysis report

Static analysis result for SHA-256 217c342658bbfe75…

MALICIOUS

PDF

64.3 KB Created: 2020-11-17 11:40:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 460da0c240942828454aa81be570ed40 SHA-1: d052b2f40974a76e0123170a11ea4dd2182055da SHA-256: 217c342658bbfe751a31b0cba4798a449b8504abee0b0b95e8833f1a0744fcb0
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 0.9998

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://trafficel.ru/strik?utm_term=core+java+pdf+github PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f93a44f41ff6.pdfIn PDF document text
    • https://liforofejot.weebly.com/uploads/1/3/4/3/134350560/7779747.pdfIn PDF document text
    • https://gizarokidobibaw.weebly.com/uploads/1/3/4/3/134363860/puxake-luwaxamexe.pdfIn PDF document text
    • https://jopojikifereter.weebly.com/uploads/1/3/4/5/134519769/3acce32a2082d69.pdfIn PDF document text
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/8045519.pdfIn PDF document text
    • https://jafumusatezod.weebly.com/uploads/1/3/4/4/134485233/sodebajoz-sewizepa-bikuvemiwu.pdfIn PDF document text
    • https://rineragafuvotut.weebly.com/uploads/1/3/4/4/134442037/rozidoti-bupojax-kalukefuvel-ravefuni.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/cc50eb4d-53b8-4af5-b49b-d2a236ab36a7/sububano.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/67340875374.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/snow_line_unblocked_games_66.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/23286517332.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/fepuzorufoxosoliwamizeg.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_off0000bf5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF5D 5272 bytes
SHA-256: ff78f3cd6d3dfa963fe1fa4e39316b32addca2d36e7b28c97393aa5a35fa9c98
font_01_sfnt_off0000d14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD14F 10296 bytes
SHA-256: 92c58a2748b91b884bb4bc47c6282141cf6239e91cc19007655640c5c2e0ec3b