Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b47e7c85aba81b…

MALICIOUS

PDF

75.5 KB Created: 2021-09-20 09:14:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bd3a4ab9a898622737222b106fd5d992 SHA-1: 2cf8d75bd03c2a12b60c98db590b778f8cb3b1e9 SHA-256: 06b47e7c85aba81b0acf063a2e23f601aec326e2516cbc9ca6bc4744dae512db
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics and link farm indicators points towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pixomot.ru/uplcv?utm_term=dark+psychology+101+pdf+download PDF link annotation
    • http://zjgjqmr.com/v15/Upload/file/2021951828441070.pdfIn PDF document text
    • http://artdental.hu/editor_up/jezugiju.pdfIn PDF document text
    • https://cometsecurity.in/admin/userfiles/file/66836302586.pdfIn PDF document text
    • http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/6894435954.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16138b88992f18---jemalerelebunatonodivaj.pdfIn PDF document text
    • http://hkbroadwin.com/userfiles/89435838775.pdfIn PDF document text
    • https://mtmnetwork.net/uploadEditor/files/42090653594.pdfIn PDF document text
    • https://10s317.com/uploads/files/202109121150341462.pdfIn PDF document text
    • https://inprovitmexico.com/ckfinder/userfiles/files/42013846476.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16141c8468db2c---76500454943.pdfIn PDF document text
    • http://sweatrinserepeat.com/ckfinder/userfiles/files/35633757387.pdfIn PDF document text
    • http://seattledesis.com/fckeditor/file/85421922866.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/987f04fa8e7812d93ab47460b36fd2e5/vodozabip.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/13054992343.pdfIn PDF document text
    • http://abcgsgeds.friendship-match.com/upload/files/lokikizibedodejudonazali.pdfIn PDF document text
    • https://powerliteaac.com/userfiles/file/faroja.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614170a947495---vobopigiseripev.pdfIn PDF document text
    • https://giyimkent.formenemlak.com/upload/ckfinder/files/7170516056.pdfIn PDF document text
    • http://veterinariogiardinelli.it/userfiles/files/14070287559.pdfIn PDF document text
    • https://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/7492427897.pdfIn PDF document text
    • http://wittymall.com/multimedia/userfiles/file/rixafumofeb.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_off0000c252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC252 11044 bytes
SHA-256: a95cd67905e3077de9723dc7ac04e1da4e504634d833b302ce67d8cd56ce3a83
font_01_sfnt_off0000dbe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE8 17208 bytes
SHA-256: 6ce08be2953beebde6099f841063aa65269e898fe7687e1ab0bde182af4ea8d5
font_02_sfnt_off0001082e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1