Malicious PDF — malware analysis report

Static analysis result for SHA-256 df030d41f468a22c…

MALICIOUS

PDF

102.1 KB Created: 2021-07-15 16:35:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 2302fa5eb4a0417216006b71cfbc8783 SHA-1: 07c33921719da29db1b3728ca5dc2f7d02f57132 SHA-256: df030d41f468a22ce19c3eb65f031b7a7e172ddac5d596ab22f58c895e2d2eb1
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress upload directories, suggesting a link farm designed to host or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9711

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://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/6r90rck9vns4ugpndipqt24ut3/16490446293.pdf In PDF document text
    • http://hubbardfamilycircle.com/clients/62940/File/bumegerin.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/wexasudokado.pdfIn PDF document text
    • http://ournextfamilyreunion.com/clients/4/49/491fb30de6d8464ca6518fa43aba5bd5/File/finarabovan.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/737c6c0f5fe5803ab51879b7169a9042/bigobubofazumituwa.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609f81cac5923---70530588191.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a203508a0c2---mitubemanugijaxevufo.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/c27gj2vcqes48pk4h836rorrn6/palirojusejonawotujivo.pdfIn PDF document text
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/64697080794.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/a0ca29ar152hmgvpdmr8iu6qc5/pezubix.pdfIn PDF document text
    • http://coimbra.hu/uploads/ckfinder/userfiles/files/wisabixilaxetot.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160910fdef059e---voxuninogubozanaxewife.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b25cd5d39bf---80766841676.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160756cda83143---38435805064.pdfIn PDF document text
    • http://saga.diamonds/uploads/ckfinder/files/pewilalumakemow.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b85540180a5---36587645527.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/85596000972.pdfIn PDF document text
    • http://fratellilongoni.com/userfiles/files/lijuperemejibidomule.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16092f5055c36a---74814478279.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4c8ef2737---befudoxafuripeduv.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/kidejokenanizuwe.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/780171b4fe8e21e43822b0037951e48e/44683360436.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806be5a17a6---88640099779.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/269b2f8c40d8681816926525016ddf8e/tuputiwes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=another+word+for+awryPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00015ddf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15DDF 18328 bytes
SHA-256: d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60
font_00_sfnt_off0000f350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF350 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B62 24636 bytes
SHA-256: 6c41714df2a0ba988c20e76a9066461ba65c083705742c8432b6f83a3d972458
font_02_sfnt_off0001468b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1468B 10328 bytes
SHA-256: 6ccfbab4a93a0d31827c7d9cc45bb1b8001a4729a969233b733640ebe5702136
font_04_sfnt_off00017b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B77 3836 bytes
SHA-256: 74a2a78a711bc36b6d25a28b93b87041198efab07f25368a2339d1b1f1529a1e

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