Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c26e80d4e88f76f…

MALICIOUS

PDF

113.0 KB Created: 2021-08-06 12:18:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 563e10f7c677e8905124b5161fb523a3 SHA-1: 242ded9e689b931555a36d84d96973461e1e5216 SHA-256: 9c26e80d4e88f76f1b1bf63e83357ac77737126df3bd425ba93984d744686e16
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised WordPress sites or disposable domains. The primary goal appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c89bcd64d---zigizederevegoxawiz.pdf In PDF document text
    • http://wmehoa.org/clients/d/df/dff1b85474dadb967ea0c40f6d5e37f8/File/67143912000.pdfIn PDF document text
    • http://calhi1977.com/clients/879053/File/ripafabomunu.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afbcb0925c2---kifakuzativu.pdfIn PDF document text
    • http://eot.mn/uploads/userfiles/files/10028386214.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f9b074452bf---lemuwibezanujijuliwiten.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/zowoterovabuzakurimovaxe.pdfIn PDF document text
    • https://dm288.com/slicice/file/20199381368.pdfIn PDF document text
    • https://juniorclublivorno.com/sitonews/images_upload/files/16492930389.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/9ef611997cb0ecdf80cbdbe8b19e3691/41797287726.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ed5121ad7---vatugubujixujak.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5475b5d63---88149585295.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/20944984362.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/052218154704.pdfIn PDF document text
    • https://powerliteaac.com/userfiles/file/35954343190.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/notal.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a5f697bc0d23ed9726a5c62bd9b37d8a/19326200947.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/92aaeb1a614fd8592ff5857a3a052903/65651927571.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/zofuzusapedopodapivaja.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607b29bc022fa---32503165769.pdfIn PDF document text
    • https://cafe-malaysia.com/contents/file/12061369416.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/xibanalirekepa.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/4902124137ac8f8aedcf8fec45794f0e/73556541325.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=toca+life+character+ideasPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000156fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156FD 10432 bytes
SHA-256: 3439753e9638441a2e89a685c75f344a3f0993be19306977973e3d05a22ded13
font_02_sfnt_off00016ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EC1 18468 bytes
SHA-256: 263fab6ac1c9bf990f6029e621a4f08ea2d8c75ddb3605f60792984b65ea8342
font_03_sfnt_off00019d27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D27 17208 bytes
SHA-256: 629fabf1688cde478fdf8f648014d384247fd20a014e506e48e6826ec574638b