Malicious PDF — malware analysis report

Static analysis result for SHA-256 9213cc5de37ea706…

MALICIOUS

PDF

75.4 KB Created: 2021-09-02 18:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a999805b5651955fc5a13ab94c8137fa SHA-1: 8d0514feaf02b52543f87e75a5a2a8e929998f33 SHA-256: 9213cc5de37ea706adeec12a39ffad839abe71fc48057d3f4361c79522422c7f
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. The primary purpose appears to be redirecting users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d69c7a7ab8---49885054951.pdf In PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210827131216.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/26493313443.pdfIn PDF document text
    • https://bearings.vn/images/ckeditor/files/sasiwasaterif.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/tazitigu.pdfIn PDF document text
    • http://belst.by/upload/file/soduzizadufes.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c62a43294b0---regoxidekizikob.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cc125851f9e---89928111425.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b76500e0c54---miwasedamexidozakejasanot.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b222d2f23b---19571214437.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/56bbc214f7a3c1830863b86560abb513/xuzumosoxatazajital.pdfIn PDF document text
    • http://omni-links-europe.com/gikebemifan.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/37b6427feef5b30f49c30dc632fd6483/45079660875.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/71868267225.pdfIn PDF document text
    • https://www.creativetalentnetwork.com/ckfinder/userfiles/files/zesadazuwirosizutalabowi.pdfIn PDF document text
    • https://telechips.com/ckfinder/userfiles/files/23582003083.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/ragoxujuwotamiw.pdfIn PDF document text
    • http://kukdae.com/files/fckeditor/file/6156679980.pdfIn PDF document text
    • http://soldearenales.com/galeria/files/85032167732.pdfIn PDF document text
    • https://ajansnigde.com/resimler/files/vavotejoluvoloxu.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c368ec838---25034024767.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/zaximogikoxomutaka.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082db5db7b5f---setevovem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=computer+programming+visual+basic+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_off0000c0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C0 17644 bytes
SHA-256: 424147ce0513dcba2835cc28d94ef526875d7e890232f4d74c1c6a7e29add67c
font_01_sfnt_off0000ee12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10629 11300 bytes
SHA-256: a4de60c75925a9533574a3c1b9235d3f8c6849eec712ce56df0425a883a1f3c8

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