Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cd0d9e4e9fd5f72…

MALICIOUS

PDF

69.6 KB Created: 2021-09-14 17:18:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cab677e41309c25b8ad04fcff60d05f1 SHA-1: b34cd0e5c193ef22a3026371757b7074a995bf51 SHA-256: 6cd0d9e4e9fd5f722d03477a0afc88913d245d8b5b5856378f8b94b8b18bd240
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous external URLs, many hosted on compromised WordPress sites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to exploit users via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://charteriraq.ir/basefile/charteriraqir/files/jaxugokebaxanofenagila.pdf In PDF document text
    • http://naoshima-habitant.com/images/blog/file/53457382029.pdfIn PDF document text
    • https://incense888.com/uploads/files/202109092025172109.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/564sj0q9rids3t07u10dmdjd86/jirita.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/1aa8410c8105fd2d05abe01ffa35db86/kipadokijomez.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/jawajolunuxavol.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/668a77f5d060289bbe774a2ff6b14288/deroligage.pdfIn PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/16840823940.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612eed83c28e8---73635097372.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613a678330f96---99875112467.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/16139232bc7475---24822954116.pdfIn PDF document text
    • http://wonsakai.com/uploads/files/80321269359.pdfIn PDF document text
    • http://jolanyee.com/upload/files/202109060850386525.pdfIn PDF document text
    • https://saksisan.com/upload/ckfinder/files/zilexegazotakufize.pdfIn PDF document text
    • https://www.mnogotrop.com/ckfinder/userfiles/files/56067264471.pdfIn PDF document text
    • http://sinoscaform.com/upload/ckimg/files/202109140255161988.pdfIn PDF document text
    • http://mweb.cz/images/file/bevanuta.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/kavumavo.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1613dfd0fe71c8---93390532372.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/kanegazolopugawiz.pdfIn PDF document text
    • https://receptabc.hu/images_banner/files/41241087845.pdfIn PDF document text
    • http://pes.edu.mn/ckfinder/userfiles/files/sumivenagerikaxisuxata.pdfIn PDF document text
    • https://preciseenergygroup.com/media/sivaseviniwekatizowuj.pdfIn PDF document text
    • http://corporatiegids.nl/uploads/files/31702797245.pdfIn PDF document text
    • https://stgeorgedentalcare.in/ckfinder/userfiles/files/xazavokor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=mybrute+android+downloadPDF 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_off0000b534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB534 10508 bytes
SHA-256: fecfd8cfdd4975835562f85d14126711dcce34f27cf54950ff82b37ad5c6c51c
font_01_sfnt_off0000cd45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE557 14148 bytes
SHA-256: d783129f0cba7107c7e3f45b43e1046ed1076c0884cf5a6f66140a7749ebff04