Malicious PDF — malware analysis report

Static analysis result for SHA-256 1401d39d48344b63…

MALICIOUS

PDF

73.3 KB Created: 2021-09-04 05:01:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2cb9255c90308ff360b38c99cd281d98 SHA-1: a4c34172cdfcce2451615576122ec469ba92acf8 SHA-256: 1401d39d48344b6337e574b372fb0c1463e0a6af6f716c43f5b53cae909dbe85
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links, many pointing to compromised WordPress sites and other domains, suggesting it's designed to lead users to malicious content. The PDF structure itself appears to be a link farm, a common tactic for distributing phishing lures or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://rocincorporated.com/domain.com/images/dynamic_pages/file/28117292498.pdf In PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f0882498e---15727135204.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/29333693642.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/3365296cc7c1ccdd8bd1a180ae22f181/kesopemonivib.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/2c81cf12928572d2f692492017c125e8/45377615491.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071cd8b5f0e0---8656866417.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/robonutatamugaxunudel.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/givotupixa.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/ruzor.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/l9fatb9rak2hs9gvupmag1pn0h/69258775491.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/3u1e09eo7b8vv5brskkn6qgk8a/tirobagujuwolojona.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/96394956364.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/acdb9b6592bb3ceb00b43b5e52bf19e0/rurotalasunewowojiperam.pdfIn PDF document text
    • http://illinoislivestock.org/userfiles/file/sumoradapudo.pdfIn PDF document text
    • http://usairsprings.com/userfiles/file/74830564463.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c512b3b88ce---411029449.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160e88132d9929---59956059048.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/pogetulatuteroled.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c673c412f---nemunafakilaxuzupudovil.pdfIn PDF document text
    • http://potentialdesign.cn/userfiles/file/1628754697.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1610d845d3bc2f---23841988608.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b26e03beab---wuwetutevigixunax.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/rurefukevolawivex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=cybex+750at+total+body+arc+trainer+manualPDF 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_off0000ba27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD239 16712 bytes
SHA-256: 3eabc3ece760979688070691ff8702c7fe0b97a3b7fea3e5718dcbd1ec2b88b8
font_02_sfnt_off0000fd7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7A 11156 bytes
SHA-256: 6ed63438d68ae32640fa0b7312b359907d62b6673c31c98b309805e72a158658