Malicious PDF — malware analysis report

Static analysis result for SHA-256 92b02c09decf9294…

MALICIOUS

PDF

72.6 KB Created: 2021-09-26 01:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 895ae29660c55cc7dffc8f54737cbf4a SHA-1: b850f1a57ee44cdbec5b5d19529f0186be66a619 SHA-256: 92b02c09decf9294273e286de18ab5a025e12c9fd8a67d700031e7d1608425cc
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to compromised websites or disposable hosting, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://www.babetravelling.com/ckfinder/userfiles2/files/37027380185.pdf In PDF document text
    • http://wsmr.us/userfiles/file/95334515241.pdfIn PDF document text
    • http://lapawan15.com/shop/fck_file/file/duvunivekolebusoxezidobud.pdfIn PDF document text
    • http://gddfboiler.com/uploads/files/wilubitamud.pdfIn PDF document text
    • http://gpba.ge/admin/ckeditor/ckfinder/userfiles/files/vezozoguxujok.pdfIn PDF document text
    • http://usefchina.com/uploadfile/file///2021092605062330.pdfIn PDF document text
    • http://simp-q.ru/userfiles/file/25236541143.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/ipd6d643usqde04582dm63shl4/zifanezorusa.pdfIn PDF document text
    • http://kiszelyugyvediiroda.hu/docs/file/52289707925.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/22854651254.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/8j8at48fbohg6628r6rgfcpntu/zeberufosanulovuj.pdfIn PDF document text
    • http://kabinet.puzat.ru/marafon/uploads/files/29342793407.pdfIn PDF document text
    • http://namkhoabacninh.com/images/files/52879343104.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/10377936695.pdfIn PDF document text
    • http://hexindechem.com/upload/files/75599641149.pdfIn PDF document text
    • http://ruben.pl/ckfinder/userfiles/files/digirafag.pdfIn PDF document text
    • http://redskap.ru/userfiles/file/kexapaxuzu.pdfIn PDF document text
    • https://rajatotogroup2.com/contents/files/32682359787.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ec4516cf11---togojubixibomerajepevaku.pdfIn PDF document text
    • https://perfecthospitals.org/FCKeditor/file/31226066555.pdfIn PDF document text
    • https://sbsoftware.ro/admin/userfiles/file/ripisaretasunijikajufepi.pdfIn PDF document text
    • http://infinity-pro.ru/userfiles/file/befaguvamefenavelor.pdfIn PDF document text
    • https://sudahhabis.com/contents/files/zidujurerufupimozojoge.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/gununowebosokapilakaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=naruto+shippuden+ep+168PDF 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_off0000b4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4A7 10948 bytes
SHA-256: 17da3c6b341e94e161270ce40de70a0aad93433268b9a7f6180ac27e6c175cda
font_01_sfnt_off0000ce0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0D 17600 bytes
SHA-256: 1a8c58d418c39876d03062db5f335a0cefb57235299acd0d90b5ec42154c5e70
font_02_sfnt_off0000fb2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1