Malicious PDF — malware analysis report

Static analysis result for SHA-256 d022c65fe4fb376b…

MALICIOUS

PDF

73.0 KB Created: 2021-08-28 06:56:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9c65451e5743b3503b6328f8db065c6f SHA-1: c63bb31d1efa29a4dc69d0f3405c12c50908b685 SHA-256: d022c65fe4fb376b357736a0961650a1203aedd9a61b3768eec35f63f6ebe083
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to numerous URLs, many hosted on compromised WordPress sites or disposable domains, indicating a phishing or malware distribution attempt. ClamAV detected this file as 'Pdf.Phishing.Trojan', and the ML classifier also flagged it as malicious. The presence of multiple external URIs and compromised CMS upload links strongly suggests malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://officinedesign.it/userfiles/files/tugukof.pdf In PDF document text
    • https://erdenet.mn/userfiles/file/79929015571.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/famokufutejokimakojomesuz.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811e2e66e98---zademejaribus.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/34391095987.pdfIn PDF document text
    • https://faceless.me/userfiles/files/1887108687.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16077c7bc55fbd---bozijomawulek.pdfIn PDF document text
    • https://zoomkish.com/basefile/zoomkishcom/files/gexevidosexinajada.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/1ac52f8a2b9ce6ad4df87faaab3a345c/1513600795.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/selurosigiwovavolumafe.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070237682e99---77917993797.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/gevapadiwufebon.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/gipikupezaj.pdfIn PDF document text
    • http://gyobel.it/public/file/7604897377.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c71ac498c---31778668408.pdfIn PDF document text
    • http://dashoernerboot.de/userfiles/29704440258.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/06r5caq30tlf4t9dd2daqks0uv/gisewekulozetukapax.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/83089699791.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/hnk5fsr26vebeu6svfvftmh6s3/68250468393.pdfIn PDF document text
    • http://elm3rad.comfile/70608701410.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/22663160934.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073ca1ca3e9e---vijuxoxigekoj.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16126a06825604---pufetalarevovivugunav.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7dfa9ef59---nolupig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=do+you+cut+puppies+nailsPDF 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_off0000be84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE84 10480 bytes
SHA-256: f8b02cd8298d5f9d0b259b0bd8ce89eb7191287999e5254d757b15a9f00f56e2
font_01_sfnt_off0000d686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD686 15372 bytes
SHA-256: 9ec3e7f9aa12b85fd355ae588115071fe887a1baed920e33cf7e24681fe51288
font_02_sfnt_off0000fd5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1