Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d0ad0a463afa89a…

MALICIOUS

PDF

170.3 KB Created: 2021-07-31 15:06:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 1b34d36bb3342df1717e14ec85f766e1 SHA-1: d65e16692bc9c7d42c94005bcc329c4c51b2d144 SHA-256: 7d0ad0a463afa89a7c501f2af7d09840f36caa6b9093d6b9cc03d6845268fee2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous external links, many pointing to compromised WordPress sites and disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious link farm designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

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://infrive.ru/uplcv?utm_term=matlab+for+engineers+moore PDF link annotation
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cde97eab0d---77263518961.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d831080ae---91980962357.pdfIn PDF document text
    • http://teaandtiarasottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/87417096478.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/a603534251fb8e2a145a1bd25adaf2c7/11242123713.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/donubolenogesomodidak.pdfIn PDF document text
    • https://diaochue.vn/userfiles/file/jekukovonuvum.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/dutefidafafexakusezen.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/gefewiduwakupavamelokunir.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/g1e1bnnh3r68gj3jshvge4k7c2/lerabiromopuvozobavojone.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082738af160c---76820200165.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/a8no4rim3mpeai5o1a960tiil7/19142807121.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/f02d4033861133f551d6aad44226d57a/basugibosat.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/273a20f5013d6230be272f7dce41a31f/39477320112.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/31408705705.pdfIn PDF document text
    • https://bmat.mn/uploads/ckfinder/files/vofagusadunegawa.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/c68f800f1673c661d54b952240af1a17/77709366603.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092d705b4f77---5656043462.pdfIn PDF document text
    • https://ghnservizi.com/file/tagisigixerolajunek.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/gopiluset.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/a8e2b3499f7924b48159b61216112630/63987607913.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/kalijezukot.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/navixogejofeveguj.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/38930901592.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/vimuvunilerefofon.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00021da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21DA9 21132 bytes
SHA-256: da32b6385cb55e8d0c6001f4bb593426e9a1fe2f30de13bfe77c714a0475e872
font_01_sfnt_off0002546d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2546D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00026c84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26C84 10692 bytes
SHA-256: 3e8ee88df9e58a6817b353635001e3a1b9ae8a73d739912703f8b916f9d22db4
font_03_sfnt_off00028509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28509 16192 bytes
SHA-256: bfe64e3d917f904c536eed845c8da68738fad92952cf9e53c7c08a5e2fa48a2f

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