Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaee8faa77a667af…

MALICIOUS

PDF

82.2 KB Created: 2021-07-24 14:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 447348bfb8864a70413c4d67fc8287b9 SHA-1: 57b5179825719c27955e1f064e1d8dcaf9e26548 SHA-256: eaee8faa77a667af0cec94f9aa1b7de500abbe097d9ae03b35bf2ba1a969c2c4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/ff3tf54v7bgmj53c28ir1qi435/55988352512.pdf In PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcabad2d3ef---xavinepoxemofoxajuj.pdfIn PDF document text
    • http://yao-cheng.com/uploadfiles/20210620185257.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/36b0v7pbaiib39gd95nlamtunb/18998450859.pdfIn PDF document text
    • http://auroraenergyproject.it/userfiles/files/jufasefejijazuve.pdfIn PDF document text
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/36400844007.pdfIn PDF document text
    • http://aptchasers.com/FCKeditor/userfiles/file/mepivemakelajosu.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/tiwosijibele.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/52687341325.pdfIn PDF document text
    • http://jucal.es/images/file/dekikad.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/tupujajixivakugazuwoduba.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7486f2483---35849025291.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/c9a0e907f2c173673c83d0df15f2ed07/sipate.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad3b8cecd9---75261177909.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/nibegit.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/xalifopogabudak.pdfIn PDF document text
    • http://fluellensoflandreth.com/clients/b/bf/bfbe38bd58d8cb8bd08b82175287e3b3/File/23678021319.pdfIn PDF document text
    • http://dralituncer.net/userfiles/file/jolanipimemexi.pdfIn PDF document text
    • http://lurome7071.com/clients/e/ec/ec9741bbacd2a64db66b94b03f3cd24d/File/dixevivolataperawi.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/4bbebdcecf4aca58b7ab017b343069ed/8601590279.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8ffd6b012---20739888230.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/wugap.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/a5cuedaju3unt4gch0fv4kn1l7/jegijalis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=m%C3%A1ximos+m%C3%ADnimos+concavidad+y+puntos+de+inflexion+de+una+funci%C3%B3nPDF 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_off0000d92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f13e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13E 17112 bytes
SHA-256: 5bed47bc5645c269df6aa1060112e3b007d2c0f3e43aba0a49b9634a4de9174d
font_02_sfnt_off00011ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE0 11436 bytes
SHA-256: e0a2d29065a541a0a624b51e1c04564f8f2926bec86118b75fb02bd666349229

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