Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a118e1e3ab3871…

MALICIOUS

PDF

90.8 KB Created: 2021-08-03 07:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b1642408cbbee320eb464e830df227d4 SHA-1: 9319377e80077c9bf1f89019bdfa57948ff540ef SHA-256: 06a118e1e3ab38716c529c23caf300599cb1352ae8d0eaa8ee1c13fcd4951bf5
156 Risk Score

Malware Insights

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

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 sites and disposable domains, suggesting it functions as a link farm. This pattern is commonly used to distribute phishing content or redirect users to exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://catamma.ru/uplcv?utm_term=proceso+comunicativo+de+manuel+castells PDF link annotation
    • https://hyosungulf.com/uploads/file/rozizite.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607696450d26e---rapukedokemusenudo.pdfIn PDF document text
    • http://relatives-united.com/clients/75139/File/dijepibazirejenidebege.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b0f97acf5---38517078783.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608646377701b---69183630034.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/jiridavepavovuf.pdfIn PDF document text
    • https://coluer.ir/documents/file/25343290721.pdfIn PDF document text
    • http://birkhoffhi.com/userfiles/files/36632200140.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d71c971103---16395176866.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/45238588237.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/a40c30e7cd5873fc42bf438b8d16fa08/japujilo.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-6-5/20210605163856893875.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/13933857532.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/60361711397.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608212375b20f---jirelite.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/380ede4cf2802201270a4cd68c7329e7/44308313880.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/tuzudape.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/n74cbbcf0ackmso5cuqgh9thrn/47685003448.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d2ce87290---fumoxajigide.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/siiffs0517d8itsqtpoa194cj9/lokatitazid.pdfIn PDF document text
    • https://budgetparking.ca/admin/uploads/file/zokukigimalafanexe.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/354a8bc03dd39ad06ca6d1861b75c862/70262613298.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a07ee229518---fuvugakelumov.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f655bb89e3---41482459360.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/xogivojoreduduvalu.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_off0000fd5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11575 10696 bytes
SHA-256: 72df310ac5ba6df952ad8da4b36c89e81bed993dc1b5c64f638d9f1559c55550
font_02_sfnt_off00012dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFF 17688 bytes
SHA-256: fddb6a4f13cf999cc14ffc978676349d9e2a1b3a00ee07191ee256a14a98d436

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