Malicious PDF — malware analysis report

Static analysis result for SHA-256 22038e64297cdede…

MALICIOUS

PDF

75.5 KB Created: 2021-09-15 11:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 119b8edf73587a0af465352c819fcd7c SHA-1: 00eb6a96678a02c4052e46e7d62c625497d1e913 SHA-256: 22038e64297cdede9545fd0546e8d65785dcf84fe96590a857800462ab7b8b84
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ourcampuswindow.com/ckfinder/userfiles/files/79836907486.pdf In PDF document text
    • http://kpotplace.com/uploads/files/26517928643.pdfIn PDF document text
    • https://petribax.com/userfiles/file/jarenetagoxud.pdfIn PDF document text
    • https://hebatkeren88.com/contents/files/39499651498.pdfIn PDF document text
    • https://insolite.lu/img/userfiles/files/voraluvifukovadugob.pdfIn PDF document text
    • http://wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/luvorelidawor.pdfIn PDF document text
    • https://uangraja.com/contents/files/xupob.pdfIn PDF document text
    • http://vagtteam.com/userfiles/Files/4017351019.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/161403feebaa0f---24035203303.pdfIn PDF document text
    • https://zifu-tech.com/app/webroot/userfiles/files/1758626947.pdfIn PDF document text
    • http://zgic.ru/!upload/files/53961242174.pdfIn PDF document text
    • https://eprobatdz.com/ckfinder/userfiles/files/61024894049.pdfIn PDF document text
    • https://jungleflightchiangmai.com/Uploads/files/zibalegufig.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/69647138404.pdfIn PDF document text
    • http://linpus.com/app/webroot/userfiles/files/jenura.pdfIn PDF document text
    • http://ipublicity.cz/data/file/95556014010.pdfIn PDF document text
    • http://espokebar.com/uploads/files/7173264847.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613344402d4be---xukapivetizijes.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/petukafanikewesowarodaj.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/loposib.pdfIn PDF document text
    • http://belloverde.net/emailer/file/65520666474.pdfIn PDF document text
    • https://luatsubienhoa.com/upload/ck/files/35366240536.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141538ea659d---28842394499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=net+blocker+mod+apkPDF 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_off0000c046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC046 10520 bytes
SHA-256: a173a733c6bf1164dc3cb3f9aaa3abb51ebdb0dcf9c4b0a7ce33d9c1de7f9d09
font_01_sfnt_off0000d809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD809 18840 bytes
SHA-256: 3cf55ff32e0810a5ab88dbd7993facae48185a75c135bd7ba9cef556342b01da
font_02_sfnt_off000108ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1