Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4caf46204cda056…

MALICIOUS

PDF

80.5 KB Created: 2021-06-17 07:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 705b2e8ee1e9c21a593f26a087be073b SHA-1: 667e7c3b73cccf2eaa0869620ada1e865a5953a7 SHA-256: c4caf46204cda0564b709c64104b36a471e7b9f7056d315c87655cca38b200d0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits multiple indicators of malicious activity, including a high ML classifier score and ClamAV detection. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs the user to interact with the clipboard in a way that suggests command execution. Numerous URLs are embedded, many pointing to compromised CMS uploads or disposable hosting, suggesting a distribution network for malicious content. The document's purpose appears to be social engineering to trick the user into executing a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://ketchas.ru/uplcv?utm_term=microsoft+office+365+activation+free PDF link annotation
    • http://aarogyamedico.com/userfiles/file/zazoforominawudomixodozof.pdfIn PDF document text
    • http://3qlohas.com/CKEdit/upload/files/serenevazo.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/8997a8da3ba6d69564abe226c7ee5378/17597360292.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/ji6h0emhglf6hlgak2olorfdoq/sovix.pdfIn PDF document text
    • http://dnepropress.net/files/file/82564648183.pdfIn PDF document text
    • http://midel.me/userfiles/file/96343291.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/79629897998.pdfIn PDF document text
    • http://stpatricksreunion.com/clients/84553/File/71737507409.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/t95j0srlplmh6uh4c8g3co86j3/kavumozidu.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ed5d911de6---dekuwezavawi.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-6/file/49155703889.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/f8f457fbb231c35b53d272f56d0ad312/80383894564.pdfIn PDF document text
    • https://winpoasia.com/ckfinder/userfiles/files/2079612632.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_off0000fbe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE5 5348 bytes
SHA-256: d361dd22687ddb427c8bb546f149f530face569c5ff103d413edcb4393ffc51b
font_01_sfnt_off00010e38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E38 11548 bytes
SHA-256: 5ea38e2e237e1c7d75d736fa6385ed88129992ab7ef804034dfffbc1624c5426

Open this report in the interactive analyzer, or submit your own file for analysis.