Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06fdcc89facb7da…

MALICIOUS

PDF

72.3 KB Created: 2021-09-27 05:22:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9e10f8c11e9002c0310833206dbf526b SHA-1: 2db83badca01bd37e59334f07c39be0f3e9f7d34 SHA-256: e06fdcc89facb7dac9886b99c16bd2926028464f2b1fecd74343cbbeb0835431
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm. Multiple embedded URLs point to various PDF files hosted on potentially disposable domains, suggesting a phishing or malware distribution scheme. The primary attack pattern involves luring users to these external links, which is consistent with spearphishing attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 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 http://klick-tipp.info/ckfinder/userfiles/publics/files/64124450877.pdf In PDF document text
    • http://smeeing.com/userfiles/files/79898454677.pdfIn PDF document text
    • http://derp74.fooden.com/UserFiles/files/70933336374.pdfIn PDF document text
    • https://tims.ro/ckfinder/userfiles/files/ronufiwuzoxutax.pdfIn PDF document text
    • http://trunghungplastic.com/luutru/files/wowazodewutebano.pdfIn PDF document text
    • http://sperrincaravans.com/images/file/gemadopoze.pdfIn PDF document text
    • http://wordtmann.beckbauer.eu/ckfinder/userfiles/files/vunimisofebegirepeno.pdfIn PDF document text
    • http://halongwave.com/userfiles/file/fojofiponesupavutuz.pdfIn PDF document text
    • https://candica.pl/ckfinder/userfiles/files/miligijufemoxupufin.pdfIn PDF document text
    • https://hssanesteban.cl/files/55274965721.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/gikej.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/90952469517.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/92798254192.pdfIn PDF document text
    • http://khmim.com/ckfinder/userfiles/files/ligegabivel.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///32142402925.pdfIn PDF document text
    • http://bankerz.in/qpic/files/muwegejowobewawibabe.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/46765345282.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16150db4f26a3a---lomifixo.pdfIn PDF document text
    • http://xn--80aer5aza.xn--19-kmcm3c.xn--p1ai/ckfinder/userfiles/files/nesasujubu.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613fcb53ce422---21875109375.pdfIn PDF document text
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/madotozitujikimemakeve.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/gexixapodinijulojuj.pdfIn PDF document text
    • http://okna-kurska.ru/page_edit/_samples/userfiles/files/10255213614.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=android+studio+blur+backgroundPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB58D 10724 bytes
SHA-256: 370e03f5f0bc5ff76f29d7b3e5c4bdbc1d0dec5da3cafcf617f303aeb6f9f6e3
font_01_sfnt_off0000ce1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1E 16920 bytes
SHA-256: 1fcaa0ff03c959bdf32e54935f8b6695ea6224a7986b63d5a6f70082fe5b383c
font_02_sfnt_off0000f96c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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