Malicious PDF — malware analysis report

Static analysis result for SHA-256 f267d208ad4a3a3a…

MALICIOUS

PDF

81.1 KB Created: 2021-07-05 02:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 12c57bc90007c798dcc1dff713634c83 SHA-1: 11b15d8474eaf5797fd5e889f47930a6d89d2350 SHA-256: f267d208ad4a3a3af53ad4731f1e1a7dea659332bee15ada77d3a01c8566e95b
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to compromised WordPress sites and disposable domains, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://oniceh.ru/uplcv?utm_term=the+kissing+booth+3+the+kissing+booth PDF link annotation
    • https://almuhja.net/ckfinder/userfiles/files/patawotogewise.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4fdccc94c---649891728.pdfIn PDF document text
    • http://emaaravm.net/upload/files/46852058490.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160da4d8bc1284---68081472042.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/10971341661.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160882874eca19---nunaxejujubejitopuke.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/70902757431.pdfIn PDF document text
    • http://componentcnc.hu/uploads/ckfinder/userfiles/files/9991434516.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/vetijekezog.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/wijute.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/19412682560.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/19991556841.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/rj0q7fu93epaetp5kok908ftbu/fegofokigofaposowulevi.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/d6faddc976fe3c11a4a5b44b7ddb9e4a/sisazikozunijopewa.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbc3a60118---vesasoweseweduveruto.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c37abc4e722---nuxolu.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/c5e22dedcc2597e3cfb9635e4a8eec04/4227318796.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075849dbaeee---5988298153.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/xetozosiri.pdfIn PDF document text
    • https://mobspace.xyz/web/img/podborky/files/95734191785.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///32358057654.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6d0e1391fd3f010cd1287f3951c305fc/58984492231.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608e275c07506---92959358673.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16098ea618731e---gulagomobedepofeniwi.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/v6b0v5n77s9t89d4u5hend5kak/98582767344.pdfIn 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://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_off0000d5ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AD 18236 bytes
SHA-256: ded15897faa6aaf810020ff1a89a934a03ecc9465ca1c27aef95ea896ee6f5cd
font_01_sfnt_off00010580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10580 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D97 10448 bytes
SHA-256: 06aee5bb20b8e43c8141ec249778dd1fbbef5c07777b62a92be4b603a8f70697