Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb9e5247d92285c…

MALICIOUS

PDF

81.4 KB Created: 2021-09-07 03:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 379528d0e5093dcf4513c93f269e87bb SHA-1: 6198f475db11062135c0fdb95cb1700c3c2338d8 SHA-256: 7fb9e5247d92285c74acb22180064c4d2ab4242ccf4a7ea258a6677705dbfe22
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely to lure users into phishing scams or download further malware. The presence of multiple external URIs and compromised CMS upload links reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://smidgel.ru/uplcv?utm_term=unilag+admission+list+pdf PDF link annotation
    • https://habibitoursegypt.com/ckfinder/userfiles/files/bazisajavuxutaluza.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721025f00dc---kigiguxonozapivup.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/44419772379.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774bf249d41---64337753533.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/dnibk848qjaffplnkmi381dnfp/zezipoz.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/t45u226lphbgm0ajru13v7cg34/22805935206.pdfIn PDF document text
    • http://phukiendoxe.com/media/ftp/file/puveluwefiwi.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/91417528390.pdfIn PDF document text
    • http://nena-artspace.com/ckfinder/userfiles/files/rogumid.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/86897450928.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa34d1ebce---20797186837.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e76568f388---najurapopaki.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/wedekozevikasatos.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f56ae7f021---1833749259.pdfIn PDF document text
    • http://pilot-market.ru/new/files/file/38057850106.pdfIn PDF document text
    • http://moristas.com/userfiles/files/mevinuji.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/b49c85e1270a55bc0f0d3d0e2adcaf4c/jaketewuzutefaligejuda.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/db77c4f81580c90fdfd740c5bbb67324/42055328094.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b99c24f1a3---todisipejejesifug.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/32737472484.pdfIn PDF document text
    • http://1984wnhs.com/clients/2/25/250e0aaa51dad033202e6c34d8602b4d/File/9415494634.pdfIn PDF document text
    • https://chaplains-camps.org/upload_picture/file/funosamozifas.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_off0000da27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA27 10616 bytes
SHA-256: d96cff50ee85348e494bfc78a1dea9c66602fae4609a7afe7b7dd5ffe0851c45
font_01_sfnt_off0000f228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF228 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A3A 18096 bytes
SHA-256: f741600b53ce9e3b784f24c57da265d5f2b3ecfdb8f6aea07cfe54f06ab00fde

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