Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c7465d9014883e…

MALICIOUS

PDF

60.1 KB Created: 2021-06-20 12:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 72a8c5875a0e59a951dd0c98d47471fd SHA-1: fdc6d73794b454b1bc409c2d8956acf2576a82e3 SHA-256: c6c7465d9014883ecf58c096083ddee3fcf84af8ebe114c2ae899baa7830d1ce
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute further malicious content or redirect users to phishing pages. The document body's garbled text and the presence of external URIs indicate a likely attempt to disguise its malicious intent, possibly as a fake conversion tool.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=convert+pdf+into+xls PDF link annotation
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/c1k5odj2nc8drlgqnjb2g1khot/94747756112.pdfIn PDF document text
    • http://okuninka-biale.pl/userfiles/file/jugabelij.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7bbc6ed91---61647338778.pdfIn PDF document text
    • http://jucal.es/images/file/naxawunoravamen.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/1158749276.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/b799ad4cfc26f2307f812f85d0a869a0/vigiwofepo.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/612046c37e0bfd0aafc8352e5bbe38b7/lizuzunebig.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/givajamuziwejirefunem.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/mufebitat.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a12f900476---totolupedikuf.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/85ee6e7e8208ef92b3a955272653ebd2/wojezerozozafofitivexa.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09f40a31a4---xikebuvabejexesix.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/fudavasobekitokejeneja.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fde34934cf---25302306728.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16071a792e1cf5---duzekudujevusuduni.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/2ov51r98ogth4mougqt423vph1/nokibuvakekozufezuvolaz.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/gamunokixobutukavi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B3 4856 bytes
SHA-256: 4a0919703e593d3cb706a785ffdb38256cf62bb8227ffb2548a7f8534f6ee5af
font_01_sfnt_off0000c34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC34F 9524 bytes
SHA-256: 82d6c5ae2d0d0726b998dcb42b623f6741ac67d3ffb4de970385eb16b5c47e98