Malicious PDF — malware analysis report

Static analysis result for SHA-256 46326e22d6543c48…

MALICIOUS

PDF

85.2 KB Created: 2021-08-17 15:06:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c8630dda9235695fa396e00bb6fbe563 SHA-1: 36936bc5c24084f1fe0304fd82a639a363b24156 SHA-256: 46326e22d6543c4871dfdd9bbabf618f4a6d31434047ff41757483426798669c
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites that appear to be compromised WordPress installations, as indicated by the 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609acc07c08cc---49440751162.pdf In PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160efe9ca34bf7---memelapetorazunap.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/39961871199.pdfIn PDF document text
    • http://maynenkhiinverter.com/media/ftp/file/sixabunonuv.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c0c500998---jiwivugix.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/dedafugevugipixo.pdfIn PDF document text
    • http://beautifulmoda.com/userfiles/files/46107765950.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/21154098882.pdfIn PDF document text
    • http://simpelms.nl/userfiles//files/dojapamumivir.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/spp8i64je6cqlisi50ispk5vj2/tabirajojokutuxesuga.pdfIn PDF document text
    • http://eros-arena.de/eros/userfiles/file/letugamijatusaxit.pdfIn PDF document text
    • http://whitepurdeespires.com/clients/b/ba/ba703c466af5784ee38134b9d09df413/File/94631388455.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160fac8bcf0241---fozojezeworoje.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/q2bf8mervuiu6d6pcu1ksjljd2/nuketowoximaz.pdfIn PDF document text
    • https://www.southdownscellars.co.uk/ckfinder/userfiles/files/dakisiresaditemakib.pdfIn PDF document text
    • https://bakwanudang.com/contents//files/12392848301.pdfIn PDF document text
    • http://rhodeislandalpha.com/clients/56223/File/fowugubuvovipakimiso.pdfIn PDF document text
    • https://copperscraphandlers.com/ckfinder/userfiles/files/18577176705.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1610315870a85c---wopafosa.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a06d547fcc---jitarodidi.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ceedb7ea5---jegulogufuralinag.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/nenusuzajojovezajabiwe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=tactics+for+listening+third+edition+worksheets+pdfPDF 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_off0000e4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fcdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDC 17692 bytes
SHA-256: b02cf1d4b5ec7be2bbb4c19ebfc3448537c621878c059ff231fb1a32e9dfdaae
font_02_sfnt_off00012ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB9 11040 bytes
SHA-256: fedf04c1c9690e4d313fe6b3d48fd1c0f026cd91e5064520203cc4c1a5c83a8f

Open this report in the interactive analyzer, or submit your own file for analysis.