Malicious PDF — malware analysis report

Static analysis result for SHA-256 906daee72f8fe2d6…

MALICIOUS

PDF

86.9 KB Created: 2021-09-06 03:06:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 029a5339bed49874d83c28431f19c501 SHA-1: 6d74bfc5412546bfa6cbfe72721a3ddd7fbf617e SHA-256: 906daee72f8fe2d640052eae4278a2cdcdb09308afa82799d09db93b1a9e7514
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm for SEO manipulation or phishing. ClamAV detected it as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of embedded URLs and the nature of the link farm indicate an attempt to redirect users to malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://crewmak.ru/uplcv?utm_term=ramsar+sites+in+rajasthan+pdf PDF link annotation
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/93f5bb7c4b56c2269f1631540baefe4b/65820238511.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/tukojut.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/03afb8193d27b709c68f75c5c44dcbd5/49721607719.pdfIn PDF document text
    • https://walnutcreekguide.com/wysiwygfiles/file/sununipegofazarom.pdfIn PDF document text
    • https://cafepiolho.com/uploads/assets/34192719778.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160732c4e24c10---62190202890.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b77e03567eb---jukanabagip.pdfIn PDF document text
    • http://zatoodesign.com/userfiles/files/38631050595.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5b7f144ea5---54375174084.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/mabatifatulumetefososap.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb2489a87a---25453907052.pdfIn PDF document text
    • http://coreaad.com/DreamDataUpload/file/56552508566.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16097df193d332---fajexafijot.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/files/70508760957.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/65094819460.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/880b7f3753b7b2a1d71b5bbf4ab7744e/kirake.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/nefadusejerepujidamivi.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/genitazavuba.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/56957382954.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/1ab797e7a8bbf1e7439bfd950a383965/75646211585.pdfIn PDF document text
    • http://sierrahighalumni.com/clients/878712/File/xiroriloratin.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/kv06scaothulocracsequuifm3/lebakod.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608a1fbcca786---94474308185.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b7bc0a9b55---55432342528.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cadc6359b---21075394537.pdfIn PDF document text
    • https://vvpta-irvine.org/userfiles/file/muwatodesez.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10621 10772 bytes
SHA-256: ae5c067c1a1c057a6526cc48d21fda14e205a359f65e0ad573a4d237780f7c7c
font_02_sfnt_off00011ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA9 18308 bytes
SHA-256: 6ddaf7f91c01fc5583ce09c4afd7a77c5d68bfb433354dc7aa3f1a931043e3da

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