Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dcd9e583792bad0…

MALICIOUS

PDF

74.8 KB Created: 2021-06-27 12:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 82933cac0901828b91e582c008a83fc5 SHA-1: 1bd28d6478a039d4147b270f514cf954082f50c9 SHA-256: 8dcd9e583792bad0bcdd812173c84f5134f90f8e4ff5b690f2fa5bdbe446e168
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The presence of numerous URLs, including those pointing to potentially compromised WordPress uploads and disposable hosting, strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://nomylo.ru/uplcv?utm_term=holy+are+you+lord+terry+macalmon+lyrics PDF link annotation
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/befusofolopa.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/092642376db0e9ecc01c400948567646/woxebevazovetitep.pdfIn PDF document text
    • https://perfecthospitals.org/FCKeditor/file/gefisudekalugotixe.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/98221841945.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/or70b5paoqhi42vuv94i6874q3/watiwag.pdfIn PDF document text
    • https://majubesar.info/contents//files/vosiwisogisolafagepa.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b143fd822e---37746294042.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a281f75e0dd---75103185635.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160883f7e50bde---90412944656.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/32448186588.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/19583651327.pdfIn PDF document text
    • https://mollis.rs//files/fugegobe.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af8a05b078f---12552528191.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8647443d52---mobupojute.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/c8f2ca98666af914f5bece6b3fa9929e/wixurosexodepaxedotilutag.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/17469391008.pdfIn PDF document text
    • http://wallawallahighschool1968.org/clients/75819/File/56835609384.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/9fc4badb2ec0246f0067339fd314c032/49965055275.pdfIn PDF document text
    • https://rivaflo-south.in/userfiles/files/9531199120.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/8ac2c57q2r1vbfmc6lrilj0clv/53528476368.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/e9f650231f0fbc091d5897bed831abc6/xekegu.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/b2db27bcb27240e14e0eb9f66413b93c/46424557421.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/bexasubadukesunabage.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160989ff71619f---65751547605.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_off0000bebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEBB 18044 bytes
SHA-256: 4e6ea8b23aa238574e5cda38a8a93dd3a3e0c3ae030c3df0ee340f60520b380d
font_01_sfnt_off0000eb7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7B 10736 bytes
SHA-256: 367182748f12b356d2a9bf4fbcfbd788a47434ef5c9b3c7ff9021fa63ba002b6
font_02_sfnt_off0001041d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1