Malicious PDF — malware analysis report

Static analysis result for SHA-256 47962d0c6e124067…

MALICIOUS

PDF

77.2 KB Created: 2021-09-01 08:32:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0f4e4da5fb98496c60d7af44e59bf7d2 SHA-1: c942de60ae056820a26d2415998c56b8cff92984 SHA-256: 47962d0c6e124067915574d38ca23cd5cec757a1d5884c4c6bb63fdc3037c16e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to potentially compromised WordPress upload directories and other disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish users. The presence of multiple external URI heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6e71c6dfb5---ribedebeniduvabad.pdf In PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a4413b8462e---wowizubik.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160f42e430b0c5---fenir.pdfIn PDF document text
    • https://wilocom.ro/ckfinder/userfiles/files/72418500472.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/91152341523.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/3778247951.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/12565818265.pdfIn PDF document text
    • https://press-centr.com/images/file/vesofisitutozumaguwujitip.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/h1qsdp3qim7mm8nb0446db2l88/nugesiruseradil.pdfIn PDF document text
    • https://mides.vn/images/ckeditor/files/xudejurabetigitanubefo.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/qspa9b0rag55dv81uvbc0ipemi/wutelesogesivusofiroxulug.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/67929167447.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/f2e9975d02d6ccc0c193f433da0cb950/44243756086.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/116b52f16f4e86ed25a819031402c2a5/lexipazerabozixinajovipom.pdfIn PDF document text
    • https://inverpalmas.site/aym_image/files/58439073602.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d975a8d3fc---wutematap.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/99449345886.pdfIn PDF document text
    • http://techniq.ae/admin/uploadfiles/file/78910325175.pdfIn PDF document text
    • http://grupophi.es/uploads/files/12853800927.pdfIn PDF document text
    • http://darienhigh69.com/clients/866565/File/tenubo.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/bawogixovusiw.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/90601c0791ebc038d270b00dd166aeee/wazisosexirijovujo.pdfIn PDF document text
    • http://argyleliquidations.com/userfiles/files/33654010418.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16096fc3552c2f---488181735.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c59f8ca8db5---tukokenuribuxasinurup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=orion+gas+stationPDF 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_off0000cd4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE564 10128 bytes
SHA-256: 80da694bd1b890bc5121e83e37f4c6c721c73e8927897b94729045938129e1b9
font_02_sfnt_off0000fc25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC25 16784 bytes
SHA-256: 3ed53706b11d15da7e32ff57ea621175ee1bfee2d26a0104a3edf80696c64dd4

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