Malicious PDF — malware analysis report

Static analysis result for SHA-256 09c8fa19c3926842…

MALICIOUS

PDF

73.5 KB Created: 2021-03-16 07:33:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 41360dc4b292eb49fd7bf2ea2d465091 SHA-1: 56c845b69f65cb4a42a1e3e376a54e8024ae081f SHA-256: 09c8fa19c3926842615dc7a93e6b4c4c3b0a0783e58b34531acc5a5c71f79445
236 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document exhibits multiple indicators of malicious intent, including a high ML classifier score and ClamAV detection as a phishing trojan. It contains a link farm and instructs the user to disable security software, a common tactic to bypass defenses. The document also prompts the user to open a password-protected archive, suggesting it's a lure to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://golowaki.ru/123?utm_term=kmspico+10.+2.+0+final+activator PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4444104/normal_5ff036c027059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386366/normal_603fc8cd88c65.pdfIn PDF document text
    • https://cdn.sqhk.co/lokabawopup/giChjAV/13809577186.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447640/normal_600111859b7c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423429/normal_603d2b2775a8c.pdfIn PDF document text
    • https://cdn.sqhk.co/felebamifuk/gnPt5je/nenatosujepelemat.pdfIn PDF document text
    • https://tusujowifavenag.weebly.com/uploads/1/3/1/4/131453847/e2362de7a3.pdfIn PDF document text
    • https://mesikanuxiruk.weebly.com/uploads/1/3/1/6/131636832/surudadezoxejekaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451019/normal_6009d29814861.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465548/normal_6031c8c21b86b.pdfIn PDF document text
    • https://cdn.sqhk.co/xemuxebu/FicU2hQ/wixix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458390/normal_5feb80f98b9ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453889/normal_5fe64270e4b9b.pdfIn PDF document text
    • https://rukifutotusiz.weebly.com/uploads/1/3/4/6/134685592/makole_durak_puwujuv.pdfIn PDF document text
    • https://cdn.sqhk.co/pulazapusaw/bjezcgg/pepakikekanejalititukew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403128/normal_6030d4144f7b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424024/normal_5fcd11f13da86.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_77bd5e901ab9443fa9104368d46798bd.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFA 5548 bytes
SHA-256: 8dabff6a8b48bed1b92c19ca12a0d011351a2d7f8af003bd441d66bb80e474ee
font_01_sfnt_off0000eedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDD 12260 bytes
SHA-256: 78d689d652ca7cd4d086665bcc14e67f291016be8ec0162f224e799017432c2c

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