Malicious PDF — malware analysis report

Static analysis result for SHA-256 00dacd536be7488a…

MALICIOUS

PDF

110.4 KB Created: 2021-08-03 07:24:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3d1e9688f3651592c2daa51d68c8eea8 SHA-1: c9d8470a8db66a9dc4586d718d0fe54d3f23d87d SHA-256: 00dacd536be7488aab033c171c9ef98122caefc38d48735ea7709c3dcd33b916
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or are part of a link farm designed to obscure the final destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or directing users to malicious content. The presence of a link farm on potentially compromised CMS uploads suggests an attempt to distribute or host malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://chp-travel.ir/data/file/70733715353.pdf In PDF document text
    • http://zkpower.net/upload/files/93783269050.pdfIn PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/15140589805.pdfIn PDF document text
    • https://zold-kommando.hu/files/34771375434.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b873e75e6a6---91837712929.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a036186547c---govop.pdfIn PDF document text
    • https://rent-1.es/ckfinder/userfiles/files/70886383726.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774f2cd6f73---vexitupamenavetoda.pdfIn PDF document text
    • http://stallingreunion.com/clients/a/a3/a37dbb3dca22f8cb40f44de83fe48269/File/60503314669.pdfIn PDF document text
    • https://haciendaloscipreses.cl/upload/file/xuzalu.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edacecbf235---91900367525.pdfIn PDF document text
    • http://erulingua.hu/uploads/content_files/files/46673936333.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb37a9d34d5---povejosu.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/830dffe68f18c586728d28c7763e3ada/xoduxuwilapakakelupep.pdfIn PDF document text
    • http://dahchen.tw/userfiles/file/memukixuka.pdfIn PDF document text
    • http://harrisonfamilyreunion.org/clients/868801/File/xuviposakidakuwizotaxatus.pdfIn PDF document text
    • http://wonikqnc.com/upload/editor/file/1623211645.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/mikat.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160944cc6ceb0f---98617148953.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d4248c089---92707556063.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/4030c0424e9398260adbf1bb1684665f/meretote.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=oxygen+and+carbon+dioxide+cycle+worksheetPDF 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_off00014a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A5D 11208 bytes
SHA-256: 3465e116ce08338c874d02116f2b023ca848a0fab11b5e7d7903dd37f6187729
font_01_sfnt_off00016471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16471 18060 bytes
SHA-256: c72998f6e918ee9620783e9802a051ff04ba78e88812ff1531d3df232fa8b6e1
font_02_sfnt_off0001940b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1940B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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