Malicious PDF — malware analysis report

Static analysis result for SHA-256 560e08af9803eebe…

MALICIOUS

PDF

100.2 KB Created: 2021-08-22 12:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e3b8826e8b4273f09f433783041b11c9 SHA-1: a003834421226528e3281c216a387c4a1cb3f8f0 SHA-256: 560e08af9803eebee4f8f6231e86e145cae60aa54f98725c3d52ef4d5d284c16
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many of which point to compromised WordPress sites and are structured as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or phishing sites. The document body is unreadable binary data, offering no direct clues to the user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608801c133a45---23737371241.pdf In PDF document text
    • http://shepardfarm.com/clients/877021/File/luwavamexezaxa.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/8qeu1jp4o1lsft8oru2qp30kn5/kovex.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/mimupud.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/9911340479.pdfIn PDF document text
    • http://xn--szabowski-tub.pl/userfiles/file/50019159056.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/a5h0b7336jvak0upj09iomv001/jewuvuxiruxe.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/sozigijipud.pdfIn PDF document text
    • https://dintek.eu/uploads/file/dosuxenob.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/62110117279.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611908a2a814e---japupi.pdfIn PDF document text
    • https://newshieldinsurance.com/demo/gsa/final/images/file/safoperikulapowopo.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/dae4287302f9a1203cc38735adf09816/xeluvalamatapaxipupebi.pdfIn PDF document text
    • https://perfectsextherapy.com/public_html/userfiles/file/vadagiluwesosubebolij.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/biget.pdfIn PDF document text
    • https://chasehr.in/userfiles/file/tolamavofepafu.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160b55fc66e084---61164418874.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2113e731d1---59641061440.pdfIn PDF document text
    • http://baheth24aqari.com/ckfinder/userfiles/files/zozoze.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/19438232132.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/bc1bd4b642abe37e411e88eee64f702e/52847705309.pdfIn PDF document text
    • http://jcpingie.be/public/files/47611851091.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/ouo11ta2omutg709gt0r6ekbg6/1659001576.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=youtube+el+condor+pasa+flauta+de+pan+instrumentalPDF 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_off00011ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF9 19488 bytes
SHA-256: 2ef35de7fa25a29b25c99dc62cd62aa8c19bf649dd70ca11f6b552b7d2122cfb
font_01_sfnt_off000150db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000168f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168F2 11004 bytes
SHA-256: ba0cdbb4502b428cdbbd0276966c5514c227e5e28c919e7a4e2b5a5b55b13507