Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce71466356938d6c…

MALICIOUS

PDF

92.0 KB Created: 2021-09-07 21:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 41caacfa52051613c435833b8e3c9873 SHA-1: 13d9795141d3a8f399f779e7f01a233a31c7709a SHA-256: ce71466356938d6cdcdbfcd0b9ea57f4743777ce874e6ed64cc8f00d8ab40b55
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to potentially compromised websites, indicating an attempt to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript suggests it may be used to facilitate the redirection or download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/283435da01ae052f0edc81e3860d4ee9/gusesomebuv.pdf In PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/rcvo1di3rdt8hq2o0dreq71ckb/45689616405.pdfIn PDF document text
    • http://toshiba-center.ru/uploads/files/petaxapalufiletaz.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093fc5e4be8c---dokefuwosesefegegaleju.pdfIn PDF document text
    • https://inprovitbrasil.com/ckfinder/userfiles/files/tokanoxopit.pdfIn PDF document text
    • http://bigdoughpizza.com/uploads/files/59279952615.pdfIn PDF document text
    • http://battlegrouponline.com/app/webroot/js/ckfinder/userfiles/files/forawufitolimo.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a793c971b82---2069880669.pdfIn PDF document text
    • http://crocepadrekolbe.it/userfiles/files/38348683902.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5976b41c3a---bunarisasopapilejaluve.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/62043619332.pdfIn PDF document text
    • http://thetuckerfamilyreunion.com/clients/67950/File/widekopopusalelepum.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/40475641982.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3cd597d75---51829341364.pdfIn PDF document text
    • http://faxik.ru/ckfinder/userfiles/files/luwofajiti.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086a8396d2ac---mulamigoganafetexizatol.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ca1ef0c6a1---4289375541.pdfIn PDF document text
    • http://cuatudongnhatrang.com/uploads/files/tigapekag.pdfIn PDF document text
    • http://jiin-torng.com/uploadfiles/20210811215132.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/74282627369.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=energieovernamedocument+electrabel+pdfPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/xexaleligixovewugadegu.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_off00010034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10034 18628 bytes
SHA-256: 0e554ee1fcf307cdb4e0f4586de33c1e52d61dd1a1eec84935d3bd976afa95aa
font_01_sfnt_off000130d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130D6 11084 bytes
SHA-256: 87a2f25079526524f83ad56d7057c0f2b20de464bd28812e48a0245ffd39b416
font_02_sfnt_off00014a37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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