Malicious PDF — malware analysis report

Static analysis result for SHA-256 e146218123977303…

MALICIOUS

PDF

83.3 KB Created: 2021-09-15 15:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b792f4618258505736bfaefcf51ce387 SHA-1: b99824ef643935a8fc0eef254b6ab1b6c54220b8 SHA-256: e146218123977303932098d7921ddff3e90f0a5001d346c74432cac4529ee3bb
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a tactic to obscure the true destination by using disposable hosting and redirectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://consulcongress.it/uploads/assets/file/tosopif.pdf In PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/60ef80a21548eacabca40e0fb644d812/11583489256.pdfIn PDF document text
    • https://maffart-guy.com/userfiles/file/55083803841.pdfIn PDF document text
    • http://studiomistretta.com/userfiles/files/fazadew.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161326582c0d2b---3658411058.pdfIn PDF document text
    • http://www.css-jp.com/upfile/files/2021/09/08/tutepitopepuxiberez.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/161359a209ad49---tinoraxokebaw.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161403d077796d---44556576165.pdfIn PDF document text
    • https://4cmedica.com/ficheiros_upload/file/8095326378.pdfIn PDF document text
    • https://skinrepublic.vn/webroot/img/files/mopinewojifasosa.pdfIn PDF document text
    • https://e-ssuances.com/ckfinder/userfiles/files/xolagigexoguxomi.pdfIn PDF document text
    • http://clingac.es/d/files/xisabumuguxotoda.pdfIn PDF document text
    • https://khambenhxahoi115.com/images/files/kunozemumutakutewuzato.pdfIn PDF document text
    • http://dienlanhlongan.com/upload/files/30657051828.pdfIn PDF document text
    • http://www.enredmail.com/templates/files/idCliente_/file/vitefekotafagizigalurotex.pdfIn PDF document text
    • http://jsdarvin.com/files/xomezabup.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/refejom.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/94446958964.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/fobife.pdfIn PDF document text
    • http://biomax.shop/filespath/files/20210903064831.pdfIn PDF document text
    • http://agrocare.hu/ckfinder/userfiles/files/wanofenakigizezer.pdfIn PDF document text
    • https://highendteen.com/userfiles/files/nebukiwujinaniranipixor.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/b85ba7f5f99883cdde7ae1fbdf0060b9/23101552990.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/buketamumirubo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=barron%27s+toefl+ibt+pdfPDF 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_off0000dbff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF411 19632 bytes
SHA-256: 5d272fa67d1bf4e7c6daf492344cac5add980422f99ff2f0f0b24972b96d99bc
font_02_sfnt_off00012759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12759 10716 bytes
SHA-256: 6465890e03443ac15d742c67d9be350b079b76c2e40d387f165a77cbf5155c28

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