Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a0d5e601cfea641…

MALICIOUS

PDF

73.5 KB Created: 2021-09-13 06:36:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0742bd863b134b36cd53cc82a67cc1a9 SHA-1: 14caa5e940b6bcf0e034cebe14f404f89893fa6f SHA-256: 6a0d5e601cfea641d7d502d62e1fc8c26e5b1268db738d3f631b671f7414ea6e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://inwebjor.ru/uplcv?utm_term=auto+followers+net PDF link annotation
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16134847d38788---zuliwiwemitora.pdfIn PDF document text
    • http://vce34.ru/attachments/file/18748451663.pdfIn PDF document text
    • https://zegaoyun.com/calisma2/files/uploads/39179962704.pdfIn PDF document text
    • http://como.gattinonimondodivacanze.it/themes/userfiles/files/48736421285.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/mekotekewilisexikanidoluk.pdfIn PDF document text
    • https://giritrademark.com/content_files/files/wuxevosulajuranusujidik.pdfIn PDF document text
    • http://fitsiluet.cz/data/file/96442173765.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/16137801166157---patejakodilukiwejemas.pdfIn PDF document text
    • https://autopsrus.aerovents.com/ckfinder/userfiles/files/zajoxebarolobunamefetu.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/sazonesixofasolaxigojipit.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/vj5a500j829u80fq9612cf8qj1/nosirazon.pdfIn PDF document text
    • http://xprchemical.com/upload/files/mejoxitasoroditosabitujef.pdfIn PDF document text
    • https://nikolsbeauty.com/webroot/f/uploads/file/83836785402.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/giniwino.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/korixufako.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/rajibawiwumafagewa.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/tejov.pdfIn PDF document text
    • https://norservis.info/files/files/bixowurulojalifisavalawoz.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/safud.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/pudemanirixovepapukowab.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/duwobuwotagoxojujis.pdfIn PDF document text
    • http://exosushi.com/uploads/files/91122833006.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/40013b695586354c58a7353b1c4e0872/40881384371.pdfIn PDF document text
    • http://getsolarny.com/userfiles/file/likatowugusifozunawuzikaw.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_off0000bea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d6c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C0 10120 bytes
SHA-256: b206c0154ed545677a18f7c6867a31f6c79bcff4a386e8306e1af3b78b5e5d91
font_02_sfnt_off0000ed9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9E 16656 bytes
SHA-256: dbfe1a5366fb19a96e8973092f47bc11c4fe51a548d9ce4cfa2537ceadd139d3

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