Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb5011d6a76ff44…

MALICIOUS

PDF

110.8 KB Created: 2021-07-05 11:24:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8b7044ad4fbd2597614aeb453f2e15a2 SHA-1: cafb075b1647fcd31b5e606605cae491fc776bac SHA-256: 0eb5011d6a76ff4492d275d00f665ce4f192b77fff76fac664f142dc117cfd4a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and other disposable hosting, suggesting a phishing or malware distribution campaign. The document body is heavily obfuscated and appears to be metadata from the wkhtmltopdf tool, rather than user-facing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

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://cructi.ru/uplcv?utm_term=application+of+centripetal+force+in+everyday+life PDF link annotation
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/ftqo5m8ndjvvue2o3eoo79kn4q/tidasedu.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/a1805a24223c93d1740aa35df8b95ecd/pubepupupozas.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd4d92e970---pezilamomimeve.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/a42ef109aee303f5e4ce89a214deb1a0/mogewobepemulewutedufev.pdfIn PDF document text
    • http://sshs61.com/clients/6/60/60e739d5a8cf4a6710e4f064fd99417d/File/65208104451.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/171ae25812c9ca89e1603210f165ebd4/fuvosapozewakarijabinuwow.pdfIn PDF document text
    • http://ibiforstarlight.org/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/45754801336.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/simoledusatofolimute.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d276093e20---xikafugudegumulire.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/da4c3d5b10690b0c2dedcef213cdc306/pajasejoxuwejesogazabafi.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16083586aa56a2---jalifajutobetesu.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/7da7bea40dbf2d9ef197c1fb760c2c60/fokofafojiwajan.pdfIn PDF document text
    • http://adveotec.com/img/file/41590575518.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/6899d6507299349e4db34229519355b1/98744908677.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0e5abb0271---vitegotokelifozadimu.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/2f4e75ac0e05d5906a9b4ae02a8ddbc1/zilevovuxirizatisefivowo.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/680ace25cdf0ede91498136bed9cb5f3/tekixisofijopaninitokavo.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/82614036979.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/86480d68cfb2952e35d9c383149dd9ac/mopawuma.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/pape6sam3u7rir1qqn54q45uhg/ropepamakosavadax.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/mererixuso.pdfIn PDF document text
    • http://abc-tel.ru/data/File/rusagipijizutiz.pdfIn PDF document text
    • https://zoldlepes.hu/userfiles/file/4686446830.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/73807952265.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/cbovcoksuem851k8jt4ujlpjh7/1583643046.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_off000145d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015de9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DE9 10604 bytes
SHA-256: 08c98f826a2c8ca2dd11c90f848f0eca0a19f5fa7231ce7ee81862c4a3781460
font_02_sfnt_off00017654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17654 19748 bytes
SHA-256: 670912f1835a04ccd2c55133a534ae10e736966f109a89d423059b20ca3543a0

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