Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d2945c767db4d0…

MALICIOUS

PDF

85.1 KB Created: 2021-09-07 09:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4680625b03614663a8d38a86c46193c1 SHA-1: 06f4ed3b4ee1038319c417421e8dc926b1a87f2e SHA-256: d7d2945c767db4d0a7d54799344833ab0e2732381dab9031188a5f9540fe117d
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, indicating a phishing or trojan distribution attempt. It functions as a link farm, with numerous URLs pointing to potentially compromised websites, including those using CMS upload vulnerabilities. The primary purpose appears to be directing users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.pirac.org/wp-content/plugins/super-forms/uploads/php/files/04c255f1031c12c160f6b8296f1b2995/wapufizokepataruvim.pdf In PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160875c7f5ffbd---dabap.pdfIn PDF document text
    • https://maisonforville.be/documents/file/40945988462.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16096bb201c8a0---wadokirezitisibo.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/14192383976.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4d852cae7c22078681fbed0398ca25a0/rejojalik.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a90bb8daa8f---julovelapewem.pdfIn PDF document text
    • http://slsnn.ru/content/file/5111669803.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/19160071753.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles/files/37001296550.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/5pipg49gcvf5f2s4aisv6rnpv9/75341608408.pdfIn PDF document text
    • http://trungnguyenjsc.vn/uploads/image/files/84198672147.pdfIn PDF document text
    • https://chiuman-hk.com/images/file/93504813926.pdfIn PDF document text
    • http://www.manorbymajor.com/userfiles/files/bozuwitunozomofi.pdfIn PDF document text
    • http://moffatcountyhighschool65.com/clients/878592/File/28200544588.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/vapotazinifelakeditakaf.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b64d52533b---woveloretupuroxejuziw.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/9adbae5941561a90baa3e8dacbc758d9/39901142149.pdfIn PDF document text
    • http://itcck.org/upload/editor/file/tumugalogubuluti.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/luzefin.pdfIn PDF document text
    • http://caopump.com/admin/userfiles/file/83246471332.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-6-30/20210630224623220208.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=fiat+punto+1.2+2002+manualPDF 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_off0000e8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A9 10452 bytes
SHA-256: 9e0dce34e41652b86b006c1599c42dd7cbea72adab91c067596cb604326da790
font_01_sfnt_off0001005c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001186e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1186E 17812 bytes
SHA-256: a6c3019e798cd1b114558e07bc126b66c79abc9167e6363e9b43ed3489a59207

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