Malicious PDF — malware analysis report

Static analysis result for SHA-256 062fdbbe3e19b937…

MALICIOUS

PDF

97.1 KB Created: 2021-01-14 11:11:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 2708ca6a33f54915f5e0ca67a4bf704b SHA-1: 6dbc387047da709cd04e13ef022eb56197ca7415 SHA-256: 062fdbbe3e19b9376a78d8ba11a5cfdf4bb219de81a8dc8a924bc9b6e6616bc8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

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://trafftec.ru/aws?utm_term=bootstrap+blog+template+free PDF link annotation
    • https://rozutedazo.weebly.com/uploads/1/3/4/6/134646396/kodenezoweli.pdfIn PDF document text
    • https://dutilugamon.weebly.com/uploads/1/3/5/3/135301630/3664088.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489052/normal_5fbea8a75d0de.pdfIn PDF document text
    • https://site-1173675.mozfiles.com/files/1173675/13044573988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475216/normal_5fb765fb29b77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416796/normal_5fd7cea9e670d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_5f9133c4efa64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464715/normal_5fbeecb000cab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416500/normal_5fe1ffdc835be.pdfIn PDF document text
    • https://muvekova.weebly.com/uploads/1/3/5/3/135394778/7456298.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369505/normal_5fc9a9b92348f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00013bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BD9 5408 bytes
SHA-256: 01a6f79c02ce95e0ebbfcfc40b6e01238055d5b6f2769910ff1b074d942f6ea2
font_01_sfnt_off00014e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E2B 11568 bytes
SHA-256: 6be746974436da2bec4cdaf041517baf3ad163ce72b5f0862dd6a7049a03cee4