Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a0e0cb92be0447…

MALICIOUS

PDF

62.5 KB Created: 2021-06-13 04:16:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3b312034c2e7cecb0c886d0206ffb1a4 SHA-1: df0bf8dce45108d0e6c8385f84e740da8b93a263 SHA-256: 89a0e0cb92be0447a87b4aaaa8dfc08e37157f805ed00334dfb11b0ce1669baa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which host other PDF files. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics indicate these links are part of a scheme to distribute malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The embedded URLs likely serve as a lure for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8019

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://ketchas.ru/uplcv?utm_term=renaisser+raphael+520+instructions PDF link annotation
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/832134f2fe6f2f4b88b1f9a7bdb6b74c/kawuseratuliripuvid.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b3493caf26e---ripekawuzunixoxav.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/migumuvubig.pdfIn PDF document text
    • https://aashianarealty.com/file/fupuvomuwowepuwot.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/0cb6b9b5585797ac9adf40dd181b24bf/xefukabesowodawutobizudif.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608517e811b16---rukixira.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/divopoz.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aef2c581532---duvasegaxuditonenaxonabi.pdfIn PDF document text
    • https://alirezamirmohammadi.com/images/upload/files/81277269000.pdfIn PDF document text
    • http://gagutp.com/sa_upload/userfiles/file/20210526054538.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/49596242ac86e2aca4658bb1c6d7f0a8/majovetog.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608668c3ce088---fekitaguvopuzeripujoda.pdfIn PDF document text
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075da951b8ea---tafasapubamujasetewafoji.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-5/file/38554688668.pdfIn PDF document text
    • https://airshow-bg.com/file/74067667798.pdfIn PDF document text
    • http://webinside.pl/userfiles/file/42035527435.pdfIn PDF document text
    • http://www.bandungmesin.com/file/dufofuwalebibozisopen.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/e174881f7f10c58ae1e85f5ce0ca9cd1/mabifiximesenogefun.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/23iro6qmr4edt11ie8gvhk6tcc/26478575739.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE573 2952 bytes
SHA-256: 013fc9f45313cdddd5762e6694753e55f6a85ad2eec225b6e17fd140af1ee5c7

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