Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c2bc80518b904ca…

MALICIOUS

PDF

86.9 KB Created: 2021-07-23 13:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ac57149e1cf380d7289e8bd0fc3ebfce SHA-1: 8b4b0b5618d6b72c0c1602394a7c7af4807d93ed SHA-256: 0c2bc80518b904caf73658887770dce21238ba4cede984bfe72d569cdb53e7c8
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV. It contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute traffic. The presence of these links suggests an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://globalquestconsulting.com/userfiles/files/38915227322.pdf In PDF document text
    • http://asokmontridental.com/userfiles/file/28109696533.pdfIn PDF document text
    • https://habibitours.com/ckfinder/userfiles/files/78849090089.pdfIn PDF document text
    • http://irinka.org/ckfinder/userfiles/files/tebosalofi.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/79522673642.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/96079822853.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/15852207522.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/ues2pdvhl594kesoars9ej5lm1/68153199377.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/4fc25fa2eab341a139d2ef0fce05d329/76365919481.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/19409951702.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160ee1b1a50565---18587624601.pdfIn PDF document text
    • http://grossfamilyreunion.com/clients/0/00/00c8ca1d7e0432e0ca4c178cf0a97985/File/95248196733.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160f350bd7f492---65060674075.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608702140b07a---nirafovuvunezexin.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/letuxijosuzozulo.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/tinutowurupaxoluzar.pdfIn PDF document text
    • http://www.biosafety.biz/ckfinder/userfiles/files/vobaludutag.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/nizunaduki.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/34008225850.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765b5e301b2---27433602306.pdfIn PDF document text
    • http://premium-h.info/files/files/88238222364.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/4ce74795d8d9315ad347fa1b2f99b953/47705434396.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/16939249994.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/9d145effd6103f8b6745b8e8c5d5a762/66949342764.pdfIn PDF document text
    • http://diamond6ranch.com/userfiles/file/pabifojedisogimowelusox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=best+3ds+emulator+for+pokemon+x+and+yPDF 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_off0000ee63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE63 17224 bytes
SHA-256: e07b3638befba2c5c25a4854dbd8f2e12ab9746227060a4fa2b77b49400b6381
font_01_sfnt_off00011b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2E 11200 bytes
SHA-256: 56ccff4c6385355450e485be17dba8613d9e79bd72e660047c3f574bac84cc94
font_02_sfnt_off00013584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13584 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1