Malicious PDF — malware analysis report

Static analysis result for SHA-256 f58646d826596a4a…

MALICIOUS

PDF

90.0 KB Created: 2021-06-27 03:20:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8d489bf43b2ad23ded4e66727ddf9c22 SHA-1: ae63202ded24f5ebe7eebdc9aaf2ffb781ade09c SHA-256: f58646d826596a4afeab7a745bb65911c69a8ff55ffc0684dff8ff3fa7aa187c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting it is part of a link farm designed to redirect users to malicious content. The embedded URLs and the nature of the heuristics strongly suggest the document's purpose is to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://inwebjor.ru/uplcv?utm_term=jd+farag+prophecy+update+2020
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/7dapr6d7042bnen6habk8ckig7/tozobukofob.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c797cf0bbc---geranukimarazeze.pdf
    • http://gorillatheory.com/admin/upload/file/50895279987.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/iqtr8h7llst1flvhmh8eo3itfp/tosepidemevizosijuvola.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16095c45ce7376---bikemafobomavosopulo.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bff74de7053---dozimutivefejekuduxi.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/29f6d227d111cc308caa077ac644a4f0/5176621485.pdf
    • https://aterhesseg.com/up_image/file/29926856828.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/btbqnvek1v5si0km53n1pgn160/27152117824.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc843790ce---jinamawiti.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/02sdmlkhukthmd8qr4t8s9di80/31767766766.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/963273e6e0439a42baa39ec66e84503a/lopapo.pdf
    • http://anhuizhkj.com/upload_fck/file/2021-6-25/20210625144918408720.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087e773532fa---30625191942.pdf
    • http://studiogallerani.it/userfiles/files/12256716059.pdf
    • https://dailyiat.com/html_upload/file/zijimijerujukexusit.pdf
    • http://smcertificationservices.com/userfiles/files/14317487697.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160d4048969427---jopumuzexupuvaxinil.pdf
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/0002115062d6109856bcb8e69ceec03d/vodetufunogenenetoxikug.pdf
    • https://varbackaforskola.se/ckfinder/userfiles/files/32809914606.pdf
    • http://bradleyhillsapartments.com/demo/uploads/contents/file/68188734681.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef16.bin
8098a8bde886a4ef44998528a3a66ee26c53c7b1a16034eb34807c4793c51624
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF16 17724 bytes
font_01_sfnt_off00011d9b.bin
881610bf7df2647c28ea67a26f31feac11f47df8c8e0d9735cc80d428b8d034f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D9B 10936 bytes
font_02_sfnt_off000136ec.bin
45af937212f41e51c28bead6a37202cb127cc51326c3d53615a8a14363d6c11d
pdf-font-stream PDF embedded font (sfnt) at offset 0x136EC 2704 bytes
font_03_sfnt_off0001427e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1427E 16792 bytes