Malicious PDF — malware analysis report

Static analysis result for SHA-256 069d4fd3daa464e7…

MALICIOUS

PDF

102.8 KB Created: 2021-09-08 08:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5870532e87ef3e8730d657658593d388 SHA-1: 502610aade7b8896f0c6e9fd2ee9bd946f7878a6 SHA-256: 069d4fd3daa464e7b12a94032528c64703d38f52f93029f025362373c1bee45a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal a link farm structure pointing to compromised WordPress uploads and disposable domains, suggesting a phishing or malware distribution campaign. The embedded URLs are designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://besttailor.info/ckfinder/userfiles/files/ziravoxametekajidalu.pdf In PDF document text
    • https://iieng.org/editor/ckfinder/userfiles/files/veridesar.pdfIn PDF document text
    • http://sunarfactory.com/userfiles/files/42643521151.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160f3c8a8bcf76---44849669872.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/supixupevifenegapevigep.pdfIn PDF document text
    • https://stonebuild.bg/f/uploads/files/27815003557.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/9d72cb059eec22632e8a857189ec8759/51312888174.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a064671c23---72478261111.pdfIn PDF document text
    • https://kemxoi.vn/app/webroot/files/images/pages/files/99991647085.pdfIn PDF document text
    • https://avenue102.com/uploads/file/21718441047.pdfIn PDF document text
    • http://rulada.by/upload/editor/files/97482358563.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/18481486108.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/10007785154.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160944aa849d59---1674407234.pdfIn PDF document text
    • http://nfc.soo.jp/file/64312487335.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/31380287286.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/lesogodegibinuvanuda.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/wixejawokakuxavobes.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086bc64b9d49---fufolidedil.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/zevubolu.pdfIn PDF document text
    • http://xdata.pl/app/webroot/img/ckf/files/jogesowofewodepapamolik.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/82532370132.pdfIn PDF document text
    • http://3wsystems.com/shipinc/userfiles/files/dowapopojudavesufazil.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608c441f83bca---34782471446.pdfPDF link annotation
    • http://sskj.pl/userfiles/file/tafilobinebimij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=autodidacte+en+anglais+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_off00012734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12734 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F4B 10776 bytes
SHA-256: ed47010d283e6871ffe2a9df3d7ffa49c41a4f08c0afe9c245f26d1d1b20d0ff
font_02_sfnt_off00015806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15806 21320 bytes
SHA-256: f3a866951121d3c4e9a1302a3ad840336be3f6cccf7711208d074e61fd3a602a