Malicious PDF — malware analysis report

Static analysis result for SHA-256 362dedba46a8168c…

MALICIOUS

PDF

88.0 KB Created: 2021-06-28 03:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7cb9ba60a6a3fef102bc6c71c1e5393c SHA-1: e7384b914047bc7c61b1c17ce002bb2e7f535b39 SHA-256: 362dedba46a8168ce0030d69afac5d4714ba84234739d9e8c4148500322a0967
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to potentially harmful sites. The presence of external URIs and link farm heuristics strongly suggests a phishing or SEO manipulation attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://monographie.com/ckfinder/userfiles/files/mojimemo.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ee42f35cb---lubiduruximokuxobenumotu.pdf
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/953ae2ba5e05dc4063e9af94b58985cc/9785948307.pdf
    • http://anhuizpyy.com/upload_fck/file/2021-5-1/20210501015636733364.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/oqng2pho5b1ea8mvhcas46r0h2/zoxixudoza.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/69a2c68a9a27d91955e0c1a48ffa66b7/matozufobopebaroxeworuxes.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/5e38585pcu8vllfocek7m8gnia/xoxavugado.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/e5hn3vi2rjkiio213e7kd69mqj/63359676791.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd183337f6---solapamafoxemoga.pdf
    • http://belst.by/upload/file/97371867698.pdf
    • http://www.vljainandco.com/userfiles/files/rebirewuxalibex.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd2c12bf62---saxolefejufedudapafemeb.pdf
    • https://numen-wow.com/userfiles/cloud//files/73040954635.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea113c04a8---55471027253.pdf
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/d19230a809d509b558ae2d25802869d7/21155446375.pdf
    • http://nordicaluminium.ru/userfiles/file/xawenine.pdf
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/4b75c6cff893343d61eb9cf33cd2c362/39391496917.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/08ff8dc90bbf203d68ca2c7f3c77b14e/40546181225.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a427964cc3---velukenisizerigodimire.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/477587b6a28b07e0021608ed7f9350b5/nekokanidekixesezaluf.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d903dc43743---rojopenoden.pdf
    • http://wskinbody.com/data/boardData/files/doruwalubodomafovenijek.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/pqm76k6ljtog34hlsght5h52si/45131214423.pdf
    • http://www.proyecpapel.es/ckfinder/userfiles/files/feruxevurupexola.pdf
    • http://mvhs1964.com/clients/2/20/2030ff4f331b14c2016b95997514b7ac/File/26104940696.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723b96dc132---85298236205.pdf
    • http://gtlmarinefuel.com/userfiles/file/65136918185.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=how+many+books+are+in+the+old+testament+of+the+catholic+bible
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1c2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C2 16792 bytes
font_01_sfnt_off000109d9.bin
355663e558dcc327a8c994f94da79c7ba94ff64c5ec319d9ff1e3575a0bfd1b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x109D9 11164 bytes
font_02_sfnt_off000123c5.bin
819df04b3c12c6a9aa4453b314aa23cc4d98a150469f1f74a0387a26227503c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x123C5 17520 bytes