Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ffb82ba84c7b6d…

MALICIOUS

PDF

82.6 KB Created: 2021-03-12 09:26:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9a58b50e37fe81960bb0769f6be0a135 SHA-1: 55272fcf84b92545176dcb278e28cc09657f63b1 SHA-256: f2ffb82ba84c7b6ded407e04d104f5f5219cd4a09ba7cffeeca1abf39674f0f6
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://vilenefex.ru/wix?keyword=abcd+objectives+for+math PDF link annotation
    • https://cdn.sqhk.co/jibezilesu/hepOH18/xisegofesewumamuloriromom.pdfIn PDF document text
    • https://cdn.sqhk.co/rularijulen/ihQjjih/vofot.pdfIn PDF document text
    • http://bimoluk.iblogger.org/somiwowiberulunalem.pdfIn PDF document text
    • https://cdn.sqhk.co/lexaxemiji/lijhgrF/angry_birds_movie_2_vr_review.pdfIn PDF document text
    • http://zajapokel.22web.org/1537634241.pdfIn PDF document text
    • https://cdn.sqhk.co/luwokiseg/jcggNBk/rutigivebas.pdfIn PDF document text
    • https://cdn.sqhk.co/vedanoderifu/jbgcir4/waruxobuvujurexibopipixox.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/fWMgdVX/27081103948.pdfIn PDF document text
    • http://vabenawak.iblogger.org/wokefirebudum.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/237a6001-d6d9-4c46-b213-09b1eaba95c6/plantronics_c054_not_working.pdfIn PDF document text
    • http://kewumexor.epizy.com/worship_instrumental_music.pdfIn PDF document text
    • http://redilupabisaxo.rf.gd/quarterly_payroll_taxes_form.pdfIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_4251e87169a34d82b9606d03f430f666.pdf?index=trueIn PDF document text
    • http://xerevim.epizy.com/60108857320.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e479a0d-5f0a-4126-8ce1-1013ac11ba06/40890333254.pdfIn PDF document text
    • https://a9f3490c-def6-45ea-9957-aefa341d54bd.filesusr.com/ugd/84b587_08de3be97aad4f2daf35c1344221f0bb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/05855d01-09ee-4e10-aa57-2fe5ab17be7c/que_es_exponente_en_matematicas_definicion.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_off0001060c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060C 5492 bytes
SHA-256: e912f63ece0f732b12ab66122a02020ec2f44945b72844773414216ff75db6b0
font_01_sfnt_off0001189c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189C 10884 bytes
SHA-256: 4230547976745f80241a50e91eb8d4310e193196bdf170585c17dc579b05e44b

Open this report in the interactive analyzer, or submit your own file for analysis.