Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac0cc0190bed2101…

MALICIOUS

PDF

90.6 KB Created: 2021-07-03 06:30:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 181d30acf7e0bec366d6793ff2363f67 SHA-1: 69596bb86921130ee4a3a99cb72e7043302ff162 SHA-256: ac0cc0190bed21014a9fe865ecb2d779ff76fac60de4f7fdd9dd3f1c14194653
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of numerous embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/1qh733p3oju78puurnbn48ea3i/wememujow.pdf In PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/hlu5q796283m1id4r7n8qdg658/59605100477.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160908ba1d8860---96187930299.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/39768433679.pdfIn PDF document text
    • http://lordbeaverbrook1973.com/clients/76835/File/139399860.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/14d46c96f16770351fd46818a8fcea91/96622098218.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/amjihqb4plpb8j5ogub7ejph1j/55340986563.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/4e0e2f6c8297189a83dc30c2fdf3cceb/98802409866.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a986804f399---22925325080.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/c793a6bc5ba54db5461c51985f7138f1/jabuxogek.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/137e9b2fbbfb2d2b4192b5bf543ea05d/varusuvikidowij.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021530160305167.pdfIn PDF document text
    • https://soechi.id/userfiles/file/lunigudunuseriw.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/19187680131.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/55870548546.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/57695909504.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba9a51ab64---sagogifararemivewede.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609f01d9dd249---99189308126.pdfIn PDF document text
    • https://mystruggle.uk/indigo/ckfinder/userfiles/files/nipepo.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0382a2177---15717847756.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c407ca8c2---41094126367.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bccf23ca03f---26068052284.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/bfb6fd32d7a81d4c5e79bb5687b4f2ab/xobubikuwurekobej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=how+many+8+oz+bottles+in+a+gallonPDF 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_off0000fc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11450 17408 bytes
SHA-256: ea47d12332ec7dc0bfb01f782cad17c5d017bf2b07130e81bcc8a04c0fed65a5
font_02_sfnt_off000141e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141E8 10952 bytes
SHA-256: e1539c7c2b0776187e06ad15a1f5214391f39c1f2561edb3a35f9d8f9acab9cf