Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2aa0f6a508b242…

MALICIOUS

PDF

81.1 KB Created: 2021-09-06 16:24:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5a5381942cb644d35593f65db5ed1289 SHA-1: b7bbd1fc56b2f059ffe192954d62024f70a59aa4 SHA-256: 8e2aa0f6a508b242d8ba83c8e4420c6968c7ef10eddf9c6d11b37db34d9a28e8
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external URLs, many of which are hosted on compromised WordPress sites. The presence of numerous links and the use of 'utm_term' parameters suggest an attempt to manipulate search engine results or engage in phishing by luring users to potentially malicious content.

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://pixomot.ru/uplcv?utm_term=vendedores+ambulantes+en+mexico+pdf PDF link annotation
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/414ec4810d887fa5617a42f21fc98bec/lozutatugobejara.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/f7b62c21ff58877e1d2b957045717bf7/64166347346.pdfIn PDF document text
    • http://climacom.eu/userfiles/files/82122967339.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16074437b2dc54---6479417996.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16073f0a1b02db---tudegekariwoponuwomow.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160adcacae9f3a---kakisuva.pdfIn PDF document text
    • https://malabarmail.com/ckfinder/userfiles/files/tolavotejusovovup.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/1294208489.pdfIn PDF document text
    • http://malifer.hu/upload/file/waxurowefikaxebug.pdfIn PDF document text
    • http://medizator.ru/ckfinder/userfiles/files/bugigukesiz.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fa860cf39---84976626084.pdfIn PDF document text
    • https://ikuseikyokai.jp/ckmedia//files/27889684821.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/sopemeten.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/28011033969.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/161109218c6707---sanexesulelajibobukewip.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/fiwozujezazozodok.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160c7705ab2cc6---22450086148.pdfIn PDF document text
    • https://izr.fr/files/favevewigevinoso.pdfIn PDF document text
    • https://comfort8889.com/upload/files/xinixujesezikoropo.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d472356303---supukonefemasewo.pdfIn PDF document text
    • https://ngusacdon.com/upload/files/fanupodibizapeje.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_off0000d6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A6 11092 bytes
SHA-256: a996a7cada5918491fd11b21dd06e635ce5361d894f17ed1466550ae094b4b8b
font_01_sfnt_off0000f04e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04E 18456 bytes
SHA-256: 724ec12ed6f6635d781294f7883267099de16637384ad766f5ea28579a431687
font_02_sfnt_off00011efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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