Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ee0bbf9e2219a7…

MALICIOUS

PDF

74.5 KB Created: 2021-09-04 05:36:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 264535b2349f972acf240b7fd395915a SHA-1: 931969f0c01126db2fc610a218129026dace01f2 SHA-256: e0ee0bbf9e2219a7fd6077511a120e5bf10964bc239a1ba773159c910a1cea48
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or other potentially malicious domains, suggesting a link farm designed to redirect users to malicious content. The file's structure and the nature of the URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/nagolu.pdf In PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/welipigezete.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/15d8ac31439bf0868ac6d1b76902ba4d/moteru.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160afdb6cf15b8---34800160987.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/sigewoj.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/66876530698.pdfIn PDF document text
    • http://rayzerfamilyreunion.com/clients/0/08/08e2d5bcffca37c2e1a82d364f4296c6/File/barexudidamoxo.pdfIn PDF document text
    • http://axwelindia.com/uploads/34893730611.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8b888c4f1---gikajo.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/c09d00b9fcd27a5ad201abba78e3a13f/lagaxudivaziso.pdfIn PDF document text
    • https://healthmatters.me/userfiles/file/borekenade.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/25445415350.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6d82910a7---tubuxilo.pdfIn PDF document text
    • http://schnauzermountainminiatures.com/clients/17729/File/zukegonezotakabise.pdfIn PDF document text
    • http://lysfyyy.com/upload/files/kotasurokojawalabatu.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c46f4416f7---xofulupifegelikukiwul.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/e62b9e1b234861b0a2fbc0725f0f4699/vatul.pdfIn PDF document text
    • http://kidneytexas.org/clients/861060/File/xenojibesawefekoxewu.pdfIn PDF document text
    • https://hattshopping.com/admin/assets/images/ckfiles/xubisofalefapedurevet.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/eun98bf59uppu1c2r9uid7n1no/15661532552.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/85f1525f062b192b69ab087516f0c5f7/kaginebavotiguf.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/josakivogetopabowezob.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a02713b010---25768339109.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/gilelitadobarosekawok.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608df15c73f25---78400060887.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=past+continuous+tense+sentences+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_off0000c0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0A1 17052 bytes
SHA-256: 301101045cf8cc3cf8fe2384c20f85839867b485a755cff25303721d717d9e01
font_01_sfnt_off0000ec3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3D 10568 bytes
SHA-256: 07c7c8b4c2227977e6d59598bb0b6876bdd612576edfdce1ec8e15d9d446e5da
font_02_sfnt_off00010481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10481 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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