Malicious PDF — malware analysis report

Static analysis result for SHA-256 08a101a8fa207a02…

MALICIOUS

PDF

69.7 KB Created: 2021-06-11 13:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7094cda6293d1b6db4c4b34cefdd3e23 SHA-1: cc1f68fe094b68323c5d897374e07445ed79d5b0 SHA-256: 08a101a8fa207a029f64589bee21bf78e68c4a29b8fede20b68597c9580566e3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are characteristic of malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9688

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://garglob.ru/uplcv?utm_term=fortnite+discord+na+east PDF link annotation
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1608ade41d7971---65081918201.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f87f39cd36---sekolomezibibulotow.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-6-3/20210603230800215308.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/99635491999.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a8becb481be---ximobexujiveluna.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b7b0344f6---mudonoriwowebakuzud.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608390c4cd659---kelaxikoxibizipowifijusox.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/2f16b3ddb437533f8cde2b8f5601357b/23056305225.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/dc45ac2298582f5d8eb4c7ad188d7ca2/jevaxali.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/290555465644.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a82d3f1e9c9---vekigotofexokidilu.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/r72tpac31fm6hkkfhdd99vkts5/mutovup.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/ed6afcb4fcc389d4477089ce034459ee/xurezuzizemidegirexozan.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074bc950064a---6189331415.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/suzoweloma.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/73193873868.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF00 4856 bytes
SHA-256: 7ee69337c52a22014be2da2360ac23296d6a4ba4c09b530aed954c3b935041f2
font_01_sfnt_off0000ef92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF92 11492 bytes
SHA-256: 34a8a6eee85c996b9e0b59f0d20a406fe220fbad9921440c00ef6ecf7d38d43b

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