Malicious PDF — malware analysis report

Static analysis result for SHA-256 335215ea353953a3…

MALICIOUS

PDF

74.9 KB Created: 2021-07-05 21:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6d7066060a0a7ce03e84aca6f53e39f3 SHA-1: 011c48b4d0f9c5277d4b71c6172d7557964da0c9 SHA-256: 335215ea353953a3c59bedccb07446c3388dc79fd8ea195ab7ef69c090a68cd9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. It functions as a link farm, presenting numerous URLs that likely lead to malicious content or further infection stages. The presence of external URIs and compromised CMS upload links suggests a deliberate effort to host and distribute malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6437

Heuristics 5

  • 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
  • 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://crewmak.ru/uplcv?utm_term=interview+questions+on+spring+and+spring+boot PDF link annotation
    • http://bhsclassof70.com/clients/a/ac/acf0241a72c9eb28a719a759cf8a4748/File/pinid.pdfIn PDF document text
    • http://restravel.ru/ckfinder/userfiles/files/sotiled.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/d87ae4222d184a42fe26857ee5f24268/92738865562.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/mo1i37lufhfrra25r2eqg56pu5/vokazewevo.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772c6549835---xofowukemadub.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606d869366596---70362924715.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/a26dfe1a766f32f820442eb9b5efead7/54244494730.pdfIn PDF document text
    • http://jaatkinson.com/userimages/nogabogomuk.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/788631aeef0e1be8a68af41e10b99ad2/kunalapagumef.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c253782518---kutivo.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d056899967---47418147068.pdfIn PDF document text
    • http://www.ochoadentalcare.com/tacgestorcontenidos_ochoa/documentos/file/In PDF document text
    • http://elitvorota.ru/f/file/lexasuj.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dc5ac8a5a50---lofutugijitidaxakevipo.pdfIn PDF document text
    • http://matras-devison.com/upload/file/8213201710.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/9v5tj8erk86hus3oddtlhgam92/16856711877.pdfIn PDF document text
    • http://ibb-online.ru/f/file/burijoxadigor.pdfIn PDF document text
    • https://reparationmobile.net/userfiles/file/65329774816.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a147844adcf---8457859210.pdfIn PDF document text
    • https://ottenburger.com/userfiles/file/warabomuvijizejemevili.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/6bbde267f567a777b8f34c5b61e102d3/rirunamutujudokev.pdfIn PDF document text
    • http://thekitchendesignstudio.org/uploads/files/mepoxodasikovaxozulalexi.pdfIn PDF document text
    • http://edanieltour.com/FileData/ckfinder/files/20210617_B4F70F5DF17591B8.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/sapamofepisubazemuponer.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/1t4sjhsteodcrhk0pa6jqi009h/27788086792.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/eee6872d3048a27c8f4af4251f911a54/35353367521.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D7 11008 bytes
SHA-256: a0038516c5a5bf323ec9fa231efb0f279806b8989e44202718dffee3f6bd6634