Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ea40326a0e2ea58…

MALICIOUS

PDF

96.8 KB Created: 2021-07-05 15:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 804bb62e8054b5a1495613446a083063 SHA-1: cbc049af77995201b58a400147a2c5e12c5ef6d2 SHA-256: 1ea40326a0e2ea583488a400bf5eba34173b957285478486e2924aa80bcd265c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, likely serving as a lure to download further malware or engage in phishing. The presence of multiple external URIs and link farms on disposable hosting suggests a campaign focused on redirecting users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16074138754018---pupuzubusufokomusepa.pdf In PDF document text
    • https://amblamy.ee/upload/file/98943014704.pdfIn PDF document text
    • https://agatanorek.com/files/file/gitorevuruwik.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706d0f97f8a---ribevupimepugi.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/tdsm2hbmioi5ml0uf6sdivd3q1/mojerapiwuvopane.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/45587514609.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/97678672848.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/ohvhdjodlpvvdla08dqdqfruip/4242786671.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/49745141849.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/tademogeginune.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/f3e98f57813fc15bbc2a6e30006fa330/vekukudafakibopali.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/5219477699.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/c4f20sl9bcqktclffpig2d1cco/babuzakivaxexut.pdfIn PDF document text
    • http://kath-kiga-bw.de/bilder/berichte/file/86733517883.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/84758391570.pdfIn PDF document text
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/31030288035.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/fuwudawaf.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16082c751afc82---5607356432.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160829be0e11b7---refigetexotulodelu.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/ee587856ba1765bae60a2323ef6a3549/76142375228.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/49452723396.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a988b530d23---faxusowukakizogubom.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160792426a749e---40662435206.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/badc424bcb71b933ea864e79445392c9/21617164312.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=frank+reilly+drawing+methodPDF 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_off000118c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C8 17060 bytes
SHA-256: e572a769632036e2ea58d6b87b5cdd7051ae61698efbe909ff54539e87c50cb2
font_01_sfnt_off0001456c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1456C 10796 bytes
SHA-256: 3f6e4ca401ba788ceb5262fd50562d422f6ba8edc4347b9b80e384c5ab8f089d
font_02_sfnt_off00015de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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