Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b3ca06275273502…

MALICIOUS

PDF

84.4 KB Created: 2021-08-26 16:06:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5ab1aca16c6ce31c06b46805628e4dc9 SHA-1: 78392b37dcc1a2ae919943aef8c70fdc509ee2d4 SHA-256: 5b3ca062752735023b15bcf827466adb6854c726ab8f4d4c5dcc5fd5224cd0d1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these URLs indicates an attempt to lure users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://medvor.ru/uplcv?utm_term=fontaine+des+mers PDF link annotation
    • https://motoquadro.de/userfiles/file/45766119800.pdfIn PDF document text
    • http://lovemyskindayspa.com/clients/d/d9/d99ed7cf7cbac978b7326c22a81d1608/File/wosedofekegodazere.pdfIn PDF document text
    • http://aligokdemir.com/resimler/files/39607198116.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/suvud.pdfIn PDF document text
    • https://aquaprosmart.com/userfiles/files/jaliboririvavodosufa.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/kutuxefivo.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611bef2340865---kexefelipuwunemorujo.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/10413e1c836ea9fe8bca95b007448d19/narakemixiwefiwejigerul.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c73f2e4805---nuxenotalovekozubogifub.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/306f63d86c2cb403249022ff0161d5aa/57209545788.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608536603886f---wafelanodif.pdfIn PDF document text
    • https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/vematiwoderiwuxisiboje.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/tisapotugefuburejoboja.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608097c68fd04---jobidevakegu.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/tuvik.pdfIn PDF document text
    • http://cobe-ing.it/userfiles/files/99380005017.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/69355340385.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/19969076418.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/69e39e02bf31e90596f7e999b24a8066/nurobebujaza.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/237vip7tgqsfgfa5tfe71s3ic1/59965272292.pdfIn PDF document text
    • https://afayl.com/userfiles/file/83861140281.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/xoweguxa.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/30652278232.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_off0000e72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3D 18220 bytes
SHA-256: 209dc01a9bcf5481a73c462d4b3a5a559c1178b4c142cacd71a939a632b55708
font_02_sfnt_off00012cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD7 10340 bytes
SHA-256: c56eaa11dc6c8836b9c5c602a65d79b5bbf2d517f522dc6e36c664215a7b36a8

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