Malicious PDF — malware analysis report

Static analysis result for SHA-256 89ebb043ed3fbc6a…

MALICIOUS

PDF

89.3 KB Created: 2021-07-29 22:53:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 3e6979490bcf1737c8866b06f80a081e SHA-1: 382a15bb4256c6daa08b1c59296572d2bbd93a16 SHA-256: 89ebb043ed3fbc6ad1f20cbf62183731ce7c9486963c9c8dd5df310eedab2387
156 Risk Score

Malware Insights

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

The file was identified as malicious by a ClamAV signature and an ML classifier. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the PDF structure indicate an attempt to exploit users by directing them to potentially malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16081ccc19ab22---mavizajukazigexusidep.pdf In PDF document text
    • http://intersonik.eu/upload/files/jekesoxegisuvaraposatubum.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/58791592051.pdfIn PDF document text
    • http://devison-matras.com/upload/file/dapadi.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/0lgtms7c9b5cv9n4ql1njqngg7/pijenozoxegorame.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/44487821333.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/kidudo.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/wujexolekotaludug.pdfIn PDF document text
    • https://jobtiara.com/files/files/nizidi.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/681b14e9808b4938817118a51006e637/49002176047.pdfIn PDF document text
    • http://yuha.be/_files/file/44667541435.pdfIn PDF document text
    • http://amicalelaique-guyancourt.fr/ckfinder/userfiles/files/bapugufamirasalaj.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa60c182347---6514050494.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/lezefu.pdfIn PDF document text
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16084b8a800bea---tokomalomulumajegeve.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7143e5a2d---mowedozojadaguromi.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/jexujibanebatadu.pdfIn PDF document text
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/mosakowo.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/puvibiritevatinu.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/xovukezifodavipivu.pdfIn PDF document text
    • http://bangtutrang.com/upload/files/9303107672.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f37bceacf3424d961b35fba93492aaec/vifafepivonuw.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/a5ed20d26ba6e43ecfb157b13bcd7083/94346300507.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/33677338.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e91dc95524---13106536343.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=download+construction+simulator+3+mod+apk+dataPDF 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_off0000f66c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66C 10992 bytes
SHA-256: ff60e51fd5e194e633fb02663a7f545e568067a433f2f7c60cc90511965edda5
font_01_sfnt_off0001100a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001281c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1281C 17616 bytes
SHA-256: 0dc63a2f4fccb7b79f05700b82f7a5377b41e3282631eee9167dea807dfbbd18

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