Malicious PDF — malware analysis report

Static analysis result for SHA-256 0147d1fa395c6c76…

MALICIOUS

PDF

88.5 KB Created: 2021-07-28 04:33:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e8f6f476d4028068dd8a57e7b416b815 SHA-1: 731583777bf5c9e2acfed3b541f29957da7ae709 SHA-256: 0147d1fa395c6c76aa627fa7d1b731901586ef5c5934923eaf7d5c9c641ddca3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/d59efc0efca66e89f60491748aac4768/80795639549.pdf In PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fce3eb73ed5---gogalowabuma.pdfIn PDF document text
    • https://qnzar.com/files/femoba.pdfIn PDF document text
    • https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/bevej.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/6938811965.pdfIn PDF document text
    • https://thenavyaindustries.com/ckfinder/userfiles/files/44757324867.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/87418211806.pdfIn PDF document text
    • https://loctra.net/userfiles/file/zomovovobipob.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/3cd2146e35ea42bb85f71e1c289353c7/rufokirisepavegigefogoki.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/5921ff79d14a2660431e9b4ee676190f/29101646400.pdfIn PDF document text
    • https://volnynaklad.cz/data/file/welibijewitofemiragefu.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16074ab9ca5b90---29793486634.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160918f742d27a.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b79c74e8a---42351844010.pdfIn PDF document text
    • http://jinohair.com/upload/files/wovij.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16092d329e1c12---tabusozujakimegis.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/h3igcansrb3ia9ei7b08fmd305/53460919087.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/j509lv27k3qihfgb5u4r4e5ok2/reginafutaz.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/xosokinarajo.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/e68157e48b57e7476c06a44523928d9f/40451135449.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/wosuparuzizajenud.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/83840405225.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=esquadr%C3%A3o+suicida+2+download+dubladoPDF 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_off0000ecf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF3 10976 bytes
SHA-256: ef3c138f0123f7109ff8186a4a556936f338aa616c16ba3ade82f2244ecd5d8e
font_01_sfnt_off000105f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F5 21768 bytes
SHA-256: b2951e6cb187617a3505874be4546f0b0c121149878e1dd33dce6d47d8ebb3b9
font_02_sfnt_off000139f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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