Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df47a0e866d2cc9…

MALICIOUS

PDF

87.2 KB Created: 2021-09-01 07:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 293d2a67a265d0a3efbcc932254e2a60 SHA-1: c06cc9110dd0db98fd9b040936058e29ca8eb1e5 SHA-256: 6df47a0e866d2cc916f7bbaa9d1d5fe9bb286d52ba7c064f458996c6bc003b14
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other disposable hosting. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to deceive or infect users. No scripts were extracted, but the structure suggests a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/bc94a5e97ae4e2b03aa220347f36c9e0/8903332861.pdf In PDF document text
    • http://xn--o39a91gvwm83kbsn.com/FileData/ckfinder/files/20210728_C10170A6E77A2A4D.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608935b035b9d---xiladomivekele.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/fotesixujaf.pdfIn PDF document text
    • http://praguetransfer.com/files/file/kekidenerodagij.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/426f8d3596ab628919134be7e432f4a1/88911487619.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/satakirozupunejonasibu.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/36d6e5ac1e1a42efd536bd6f3f872fa3/dumirotasazokikegudirot.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/a4ca5d811d2c7f88d9df370de25d14fa/82931601335.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160772c41629b7---7880782456.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/87799578508.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c858aa8f781---22651297641.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/flv3hvlnejk99rqqc9idd3l147/jiluwovedepezuwutomepid.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a12348bae---29493372277.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/naxofuw.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161139665ea260---jegamulewedudifuz.pdfIn PDF document text
    • http://evaemlak.com/userfiles/file///89744175347.pdfIn PDF document text
    • http://fsanaq.com/upload/file/210626143146203127lhes8ktpgzy1.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/2fe15268a9dc413669b336822cc6bcb9/gazezap.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/depulafono.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/caim56ki846n6r9bvr7v35to70/85315366099.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16081d9b90a86f---kojenek.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/nepajiwalazajovomipovosuv.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/visisixikofifej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=sample+resume+for+abroad+application+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6F 11096 bytes
SHA-256: 37c5898b7d4cd9761952f092c3a5149444168c5aa6595364c479ed1ea1fcc82f
font_01_sfnt_off00010900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10900 17392 bytes
SHA-256: 88009de655abef5f83afad3c246124bdba3e00d6f4c9bc53b1d8e9339b202f7e
font_02_sfnt_off000135e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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