Malicious PDF — malware analysis report

Static analysis result for SHA-256 68dfe3ecd8f7c891…

MALICIOUS

PDF

85.9 KB Created: 2021-09-13 12:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 47cb6a7fd43741919622241b4b6987e0 SHA-1: f08b94ef25f28c870003fc7a0f14ba38db06b8a8 SHA-256: 68dfe3ecd8f7c89194d628b0875c7bd6dd5500a522a20e69deb9184ef2a6b07a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious PDF files hosted on various domains, indicating a link farm or distribution network. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://bonaparte.cappencms.com/templates/files/19203032518.pdf In PDF document text
    • https://98ing.com/upload/ck/files/20210903_032949.pdfIn PDF document text
    • https://happycondo.leaddeehub.com/userfiles/files/74880006983.pdfIn PDF document text
    • http://pi-consulting.ch/download/4891707156.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/161399c1b8ed62---relipokikokekosasewijab.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/9873012500.pdfIn PDF document text
    • https://vico-immobilien.com/ckfinder/userfiles/files/2775187219.pdfIn PDF document text
    • http://studiopetrilli.it/userfiles/files/95833878948.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/43287855182.pdfIn PDF document text
    • http://mopron.ru/upload/files/pipazerukanugerinup.pdfIn PDF document text
    • http://mkconline.com/landmark/ckfinder/userfiles/files/tuziza.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/51538310310.pdfIn PDF document text
    • http://janaturismointegrato.com/uploads/file/dotefuponosemigig.pdfIn PDF document text
    • http://wohingltd.com/userfiles/99390879999.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/bitalexutarakeduxuvafeteg.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/94372522839.pdfIn PDF document text
    • http://bluebossa.pl/files/file/25679991398.pdfIn PDF document text
    • https://kit-veron.my/ckfinder/userfiles/files/35383891760.pdfIn PDF document text
    • https://valerart.com/ckfinder/userfiles/files/foliriwiwoxivomikoxaze.pdfIn PDF document text
    • http://xn--80aer5aza.xn--19-kmcm3c.xn--p1ai/ckfinder/userfiles/files/31426830891.pdfIn PDF document text
    • http://www.hkrns.org.hk/ckfinder/userfiles/files/sonij.pdfIn PDF document text
    • https://olboihorgaszto.hu/editor_up2/vekesobunogiwuvoguri.pdfIn PDF document text
    • http://abnicum.ru/files/file/werirepakuwizali.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/fedazoxidev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=android+app+usage+timePDF link annotation
    • http://pro.ovh.net/~tribuene/images/banque/file/7110557514.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://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_off0000ea52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA52 18056 bytes
SHA-256: 6c998f47dab4e9b349daf506e386517faf10035a755877dd0a790fa28a3198f5
font_01_sfnt_off00011940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11940 10772 bytes
SHA-256: e8318fcba61924280979d005f627920625697857a1c9054135024d37a7c9db91
font_02_sfnt_off000131d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1