Malicious PDF — malware analysis report

Static analysis result for SHA-256 f020ff48746e4b0e…

MALICIOUS

PDF

76.0 KB Created: 2021-09-07 01:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b10b6c05b79ea0c9f1e1b6901daf6de0 SHA-1: 7e28335aa24ab774a1820e051b7daea17cdb36a1 SHA-256: f020ff48746e4b0ec7d6da924f2cab48cd507a8f714b6b4e4590d771873842b5
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate high maliciousness. It contains a link farm pointing to numerous external URLs, many hosted on compromised CMS uploads or disposable domains, suggesting an attempt to redirect users to malicious content. The primary purpose appears to be directing users to these external sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://musorcentrum.hu/files/article/file/4999512282.pdf In PDF document text
    • http://alhouti.com/userfiles/file/73818535156.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16108c90a03237---17735860763.pdfIn PDF document text
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/632be8140c24ea47685c5ae2c566804b/tisetevinuk.pdfIn PDF document text
    • http://df-2.de/images/daten/file/5357305201.pdfIn PDF document text
    • http://satyavnetworks.com/fck_upload_images/file/tupavamajifexovu.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a876e734b73---72250076630.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/691536ee247732ef9eaa05fdfb7b97ae/kujovuburubenijix.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/firomowiketasow.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/a0acc07a87285deb07151496bc5d04fd/84766445171.pdfIn PDF document text
    • http://krupongs.com//images/file/morefufugaxuverulumaxo.pdfIn PDF document text
    • https://classykitchen.pl/web/uploads/files/wefamupikej.pdfIn PDF document text
    • http://canhtoanland.com/upload/files/5282773471.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/teralanezafagaduzoxukowe.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/53854700069.pdfIn PDF document text
    • http://www.moyekolodin.com/files/lotasidunisi.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/dorovonobixilajurifavunu.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd955dfc6b---6090360354.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/rivegubevoge.pdfIn PDF document text
    • http://promador.pl/userfiles/file/13908430984.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/milupuritonejemejopes.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/81121474551.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/15693305746.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=plate+tectonic+theory+worksheetPDF 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_off0000c233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC233 18636 bytes
SHA-256: 1ed1ea213c6082f0a073ac8437daf1b0cfb75b621e53580d6051e8ffc668effb
font_01_sfnt_off0000f241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF241 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A58 10620 bytes
SHA-256: 629b81bdb4ff923711356d9489bb5c52d9b6f5af47318349d7735dae90299174