Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff82e51229aaab4f…

MALICIOUS

PDF

86.9 KB Created: 2021-09-03 13:26:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6c6097fd70d88c295f7aa1e01d887346 SHA-1: 1e63cadda9628ca451e528cae0cc721f436d9169 SHA-256: ff82e51229aaab4f01007d4eb1e6296e6482b3c7c57fff078ab19d954a08e791
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting. The primary goal appears to be redirecting users to external, potentially malicious content, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/a218dd0082c9f23542220f283f4fb39b/xivitegi.pdf In PDF document text
    • http://famillespourstarlight.org/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/902238694.pdfIn PDF document text
    • http://studiotecnicolamanna.com/userfiles/files/9503037389.pdfIn PDF document text
    • http://www.pibmg.com.br/ckfinder/userfiles/files/files/50089519001.pdfIn PDF document text
    • https://actor-conseil.com/files/file/disisugiru.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b8303d1259a---fuwibuxotaxoto.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/mnoh7fsjhh6pjso1fhc003rea4/kijopuri.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c62f5ac9f0---77287094160.pdfIn PDF document text
    • https://abrasco.org.br/ckfinder/userfiles/files/xidapelagi.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/lolijuwudolesul.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/50738082355.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/pfj9rsvniti4i8o3ihiigk4pv2/bexuvorovutezatakovewuwoj.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0b9095146---59933845135.pdfIn PDF document text
    • http://chothuethietbi.info/img/files/tepinokexozixapavu.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a4fba0761---jexowivoged.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160782b8707547---nuwogedokuxezamimomitib.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/rulefuxopetizujelenat.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/4e07227cb677cdeb4b2246369b1c953f/bafaliledupil.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/78542344896.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/63131946563.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/20976256176.pdfIn PDF document text
    • https://grupo-bahia-real-estate.com/ckfinder/userfiles/files/91142991663.pdfIn PDF document text
    • http://chineseclothingonline.net/File/dilomutafetadojuseku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=canon+6d+mark+2+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_off0000ea50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA50 10680 bytes
SHA-256: de8f9cbb0152d46d32f44c17f03108a0d0530d4f91d9b000d3c042d536e30cf3
font_01_sfnt_off000102d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE3 19328 bytes
SHA-256: 32409c1fe1dd8705973a0a574514ff6e007cd659d9e96f940b0c8812b681dc0c

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