Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d69a8ab8381c670…

MALICIOUS

PDF

75.1 KB Created: 2021-08-04 01:52:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: f3110278787f4c8c9d30c786b655a749 SHA-1: 2e7acbf7d117bef6e657ea7b2317d36bece68a69 SHA-256: 9d69a8ab8381c670834c7671661b92d937af14cde231e149e809c4902e2d2a18
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm or SEO poisoning tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c996f7d6dd1---xulati.pdf In PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/e09fb2ed51d5991c18ba8988c0af6300/75428150526.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/b24b8b3d3560ccead4c46f0b1bbbcc7e/56951792105.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160edad75de685---zugixubujoxowuvutaf.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5ca8d5cc0---ketedijit.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/49065300684.pdfIn PDF document text
    • http://vilocom.net/webroot/img/files/jagolunejakibusiz.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/2c95b4e5f2bf2dc5ae7344183097444c/kugedipin.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608d20620d332---3284357788.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/57325074933.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/29836512294.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0434dcdc2---vuvepulelemadofevigukat.pdfIn PDF document text
    • http://tzoetemondje.be/uploads/files/22005128067.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/mutalo.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/90a62227f44205a7fcf65cf17280953c/54434058270.pdfIn PDF document text
    • http://avenue102.com/uploads/file/pebapexad.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/92034851971.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608320c7a2bcb---9072705171.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/2f0ada54a095cbd58c189aa3e2a462b6/55621816079.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609095eaa2af4---11315255411.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/mavoxinevominabelesen.pdfIn PDF document text
    • http://quatang3t.com/upload/files/riboxifinuzelov.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/relexerovijemu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=2007+volkswagen+jetta+owners+manual+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_off0000c15b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC15B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d96d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96D 15288 bytes
SHA-256: ad078b94b8bacbc5893c1a617ca7026bb1e9b596b8f1b300c1fac3f78f99e429
font_02_sfnt_off000100be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BE 11416 bytes
SHA-256: 6d1ce7255f075b41cc598b0770239a2eb3052a796c99a5c30c0f6f731f37051c

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