Malicious PDF — malware analysis report

Static analysis result for SHA-256 7edac73dfe77f244…

MALICIOUS

PDF

181.5 KB Created: 2021-07-01 15:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fff9c3e5f0b73c1b05ee645b26c4829b SHA-1: 181e710978df6422075c983b773ba0f50de0dc81 SHA-256: 7edac73dfe77f24484b223770ea40ef65c10d8c22a6c6efa8dccc543194e5753
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and compromised CMS upload links indicates an attempt to distribute or host malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9742

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://coretry.ru/uplcv?utm_term=what+is+smaller+than+the+atom PDF link annotation
    • https://rozgarnetwork.com/ckfinder/userfiles/files/tixuwawejotumeleze.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c159dbee955---39894625876.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/b273d2ef0b4f31b188e0eae222db736b/64507475879.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8ab650fb0---39522064617.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb155d1e38---97328772094.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/33216563967.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/c10f0b4729970afdbaeecad3578ddadc/fetozibagifakenebun.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/54023499895.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160abf42173e9c---92709455965.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/fupubivekale.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/o3a7h108ft825i7qmkidmhdsf1/zutuvuwisowogikatigobuk.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2dbc99df3f---suxozumegebobilodawoseti.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/29341774720.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/mjljqgf2n59uqh09qtg6l6igvg/50136206692.pdfIn PDF document text
    • http://sztarmedia.hu/_user/file/sukegide.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/75991451c09b17c1ecde462395d0ab51/rixowiwi.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160926e7498f16---janufamidowulivipijapo.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e9b4978db---15111646591.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/jodivag.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/d5d463485a1c96089469ca490a4c0da6/fivurufezinegafutov.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba17ce9a2c---92342585216.pdfIn PDF document text
    • https://mingyi-lock.com/data/file/userfiles/files/2938412363.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160d75a3290482---81971293532.pdfIn PDF document text
    • http://pamatudarbai.lt/ckfinder/userfiles/files/70621174008.pdfIn PDF document text
    • http://eibich.de/layout/bilder/file/debasaxokowesaguxu.pdfIn PDF document text
    • https://people11people.gr/uploads/File/30783275118.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_off00026594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26594 10368 bytes
SHA-256: ce0865eb5ec9ff7d0f22e565a9a158861a8fb6bc670844c2098ca1024791b683
font_01_sfnt_off00027ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27CCD 18732 bytes
SHA-256: cae0f5ef9e861f59332ddcae2fcdd18e4a81a86838bc8bbba33fc0cc7eba3b36
font_02_sfnt_off0002aebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AEBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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