Malicious PDF — malware analysis report

Static analysis result for SHA-256 202df34e1ded4175…

MALICIOUS

PDF

73.7 KB Created: 2021-09-25 03:14:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a8fe2e33a2c513c571b04a099cc265d7 SHA-1: 1da1137b232c8b2b209ce7d9575c8f74d0851290 SHA-256: 202df34e1ded4175e5898c962bcd313ec728ce460e10936c1956bd8f4c355673
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to numerous disposable domains and compromised CMS uploads, suggesting an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://nomylo.ru/uplcv?utm_term=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B8%D0%B3%D1%80%D1%8B+%D0%B0%D0%BD%D0%B4%D1%80%D0%BE%D0%B8%D0%B4+2+3+6 PDF link annotation
    • http://fc-junajted.com/upload/datoteke/fetipadimufojamugine.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/fazetutos.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/b84a885e4945da30796ecfb94a5fa37f/vibadug.pdfIn PDF document text
    • https://ashleymongolia.mn/uploads/files/58026070487.pdfIn PDF document text
    • http://pet.nfe.go.th/m_site/ckfinder/userfiles/files/wafawafeva.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/texabuvijogexap.pdfIn PDF document text
    • http://bestorkate.com/uploads/ckeditor/files/64991347747.pdfIn PDF document text
    • http://qqwandai.com/uploadfile/file/pebuxovilasizataxiluke.pdfIn PDF document text
    • http://sostrevalli.it/userfiles/files/dudujabarawo.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161377d9485c4f---wurazibujexabibot.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6629c6d20---febeg.pdfIn PDF document text
    • https://zlatartopalovic.rs/files/9139981084.pdfIn PDF document text
    • http://rajhansnursery.com/userfiles/file/tonisalu.pdfIn PDF document text
    • https://27061010.com/uploads/files/202109220554516846.pdfIn PDF document text
    • https://efficientinfocomm.com/ckfinder/userfiles/files/12712108417.pdfIn PDF document text
    • https://kujainspectors.com/candyticket/uploads/page_images/files/zadeburafujapevuso.pdfIn PDF document text
    • http://biosystech.com/pdsFck/file/fasilizuzawijepirug.pdfIn PDF document text
    • http://sweethomedelivery.com/ckeditor/ckfinder/core/connector/php/uploads/files/78528232036.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/fuzugapedefud.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/14527300817.pdfIn PDF document text
    • http://thaicockstar.com/ckfinder/userfiles/files/66820630441.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/viwebifiranagenumitid.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/20610799344.pdfIn PDF document text
    • http://sm300159.agchost.com/userfiles/files/2353820433.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/29d2dc5d0dbf9f00fa65d90761ef5386/29535061981.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_off0000b4d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D6 20300 bytes
SHA-256: 94fffbe913e70233022e3b685043f402c813721b780c363db30280a0b4784489
font_01_sfnt_off0000e656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE656 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6D 10832 bytes
SHA-256: 26f1f63827264029c7f9ab724b533156f47194b7d901f00f8bd2ecddc7542c20

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