Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22ec02543aaf87d…

MALICIOUS

PDF

86.7 KB Created: 2021-06-29 18:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f54b29237f39fa715230c8e790f2b218 SHA-1: 724576a208154e8eaf6a9fda63766bb06d32eeff SHA-256: e22ec02543aaf87dde0782522bcd7980bd8e34e988f468bf1e5bce2a6c0d8f5f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs that point to compromised WordPress sites and disposable domains, suggesting it functions as a link farm. The primary purpose appears to be directing users to potentially malicious content or phishing sites, leveraging a link farm technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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=discussion+in+lab+report+example PDF link annotation
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0abbf9f246---pirokilosivuxufubijilolol.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608863cecc095---57828738539.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2cd83ca16a---jomigekopivizudef.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/6f8649bbe9d30a74f7a729bf81cf8d5c/dojiseliz.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/52852915713.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/aktd5eh830k68k1ehsba1ijo9s/51117513652.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abcddda949e---bunexenu.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b32ce76fab8---47504814632.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/vtapmbgotibe4uieuor05bk8p5/ruzazusunukazadujupex.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/013cf2f897165aa4f34475641cfc565e/310007665.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/6349b937b78cc82e57f120e6fb43a0ce/92166825347.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1e12e887c---94281058538.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xigitugunud.pdfIn PDF document text
    • https://mimpishio1.com/contents//files/bajasib.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/d84fe7206784e6ac291dd694bcdc350e/tanitarulazuluvikila.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/aa46d1f175fe08d14a5b25a8583dc415/xulobovid.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b55af620a33---77585517240.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba03e389420---xaromupojavipo.pdfIn PDF document text
    • http://bigsvatcharasith.com/userfiles/file/5681173896.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/67bfc62b24a4dcbbb00f2514de6ca748/51742449976.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/wizem.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/58578882264.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/muveledulepirafozeg.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/822702cd01eb44a955018075da415d17/wokorula.pdfIn PDF document text
    • https://arichaindia.com/userfiles/file/wonesenazibejam.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_off0000ef45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF45 10880 bytes
SHA-256: 00a805dec4fceae32c6ec61975fd8385441254391e4c3f9d2a0153d7de0ca321
font_01_sfnt_off00010837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10837 17504 bytes
SHA-256: c513ae2217b09c6bf2d494285cee39f9c0c71ade7e4e4436d70daa1c46c8a0de
font_02_sfnt_off000135a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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