Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b756ce68c69e0cf…

MALICIOUS

PDF

90.7 KB Created: 2021-07-04 18:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2778616de031db309aa9698989e1037c SHA-1: 469536a9a53420bdee9018b9df1452ac4bd5ff15 SHA-256: 6b756ce68c69e0cfcfa59f3ca3d9be89ce6bb8774889157c3ea4c76dc2940b15
156 Risk Score

Malware Insights

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

The file was identified as malicious by a ClamAV detection and an ML classifier. It contains numerous links pointing to compromised WordPress sites and other potentially malicious domains, suggesting a link farm designed to redirect users. The PDF structure and embedded links indicate an attempt to exploit vulnerabilities or lead users to phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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 https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc99c426413---9541317004.pdf In PDF document text
    • http://pphjako.pl/userfiles/file/gijixa.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/77916877888.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/90912006772.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160814c3688f07---8801657868.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/bokavabizimiwanep.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5dfd2cfe31---misovejofujuvafabepovil.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/somal.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/21431730533.pdfIn PDF document text
    • https://bloomlight.pl/_bloom/file/wimapogowenedum.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a95dcdf0afe---66961418188.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/56f2eef1f80f9b23f96f959849d8e27d/13114824477.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace05bae220---7018467757.pdfIn PDF document text
    • http://salkim.com/userfiles/file/sarolafajekexoxe.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/vorariluxavujiku.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b71f3be12ca---61045748020.pdfIn PDF document text
    • https://betenrealestate.com/sites/default/files/file/vikesigojebofakopedaba.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/87764657979.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9c3a91fb5---nibatodeg.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/12193794505.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d72ebb5abe99f27d58bb028613130d25/31704751453.pdfIn PDF document text
    • http://tykhestudiodesigns.com/clients/7/73/7311521ca682816632878891c231d107/File/tujeliganinipexire.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608143a695e6a---57879606399.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/gimowoloxabitunexafiruned.pdfIn PDF document text
    • https://sealskinz.ru/files/file/93141832777.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=english+vocabulary+in+use+elementary+onlinePDF 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_off0001004a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004A 11080 bytes
SHA-256: 4b884b07d32681e5b63a10bacc4b169522d09f5c2abe01c6be3107424e0ebc2c
font_01_sfnt_off000119fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FA 16628 bytes
SHA-256: 2fd746215bb84865ba5bcf7625ff7bfa1b40e6f303edc56114bb158574e71b4f
font_02_sfnt_off0001451b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1451B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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