Malicious PDF — malware analysis report

Static analysis result for SHA-256 7daa8bfe85090a8a…

MALICIOUS

PDF

79.6 KB Created: 2021-09-19 00:47:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9c663ac1c08c78a71eda9baf0e7d003a SHA-1: 57352b9b8a2367d9ff3bc318e7a739cf124f9342 SHA-256: 7daa8bfe85090a8a3b9fd36e94f68d00c45de28556cc02dd0006f8e8982975da
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple disposable domains and compromised CMS upload storage, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing lures designed to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://queure.ru/uplcv?utm_term=plot+graph+y+against+x PDF link annotation
    • https://archielectronics.com/userfiles/files/499741797.pdfIn PDF document text
    • http://burattinojatek.hu/userfiles/file/pitaxagipufepigibivu.pdfIn PDF document text
    • http://klgd.spokoino.ru/i/upload/files/42899818654.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/4175f492f168b2fc43e37372fffea8da/jinejuwin.pdfIn PDF document text
    • http://ty-int.com/files/files/41089261268.pdfIn PDF document text
    • http://perchegouet.com/ckfinder/userfiles/files/52568245592.pdfIn PDF document text
    • https://podgoricki-klub.me/userfiles/file/fulevezanodofapumi.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/78364375e555ee0eacabe2393daf0ef0/53387851890.pdfIn PDF document text
    • http://b-solutions.net/userfiles/file/falubezipefojajemubure.pdfIn PDF document text
    • http://devitohomesorlando.com/userfiles/files/jipotewefolowodanegag.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/28528b5324205411fcf8c98cb75a7695/sasif.pdfIn PDF document text
    • http://hostingureitings.lv/uploads/userfiles/files/pebef.pdfIn PDF document text
    • http://scantech3d.com/files/15267834059.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/saxonab.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613d3ba55bac6---vegemufozibubi.pdfIn PDF document text
    • http://builderall.info/userfiles/file/pepawixovenakamifuwawizeb.pdfIn PDF document text
    • https://akrmedia.no/ckfinder/userfiles/files/17193175850.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/66684294ac3a2688046428b51222e240/26156229040.pdfIn PDF document text
    • http://perfekt-dom.pl/designhome/admin/userfiles/file/sifazamikalavivuvomoj.pdfIn PDF document text
    • http://grupposcorcia.it/userfiles/files/dizuxipisatelefaziz.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145ee6a11609---lufimi.pdfIn PDF document text
    • https://swalaya.in/userfiles/file/witebaxikawatalarepek.pdfIn PDF document text
    • https://optimuselearningschool.com/learning/site/images/uploadfiles/65286904001.pdfIn PDF document text
    • https://www.rapn.ru/ckfinder/userfiles/files/newulakelejikupezodenixip.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/kavapefog.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_off0000d4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBE 17088 bytes
SHA-256: fa229aed4e88f939157f40999e99ccdc6f8639a29c91ca274dae54702aa9b545
font_02_sfnt_off000118a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A5 10616 bytes
SHA-256: e783d35fd16f820caf388b8f3566fd8625780e23a03ee3c7164b144ea78d6c7c

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