Malicious PDF — malware analysis report

Static analysis result for SHA-256 2900fee2ab84ae32…

MALICIOUS

PDF

75.6 KB Created: 2021-09-01 10:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ffafde151fc0a9e9b4d139f4c0e633b8 SHA-1: 0d09bd44cf5d42ca61197ea0ea97d49850eb523d SHA-256: 2900fee2ab84ae32332897bae56d560c4e3b76352570395a24ae7d649e8a4cef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/f6f18052c7efcba6a4c64128e5ef6613/69633141074.pdf In PDF document text
    • https://telenovella-bg.com/files/boxulupisifaxobolidejoge.pdfIn PDF document text
    • http://canvangdientu.com/images/file/jetojosa.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/89330413685.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9d805b762---pumubiwizi.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/6a58f46efee408c11afadea54d53ae61/wobijedalitamixotef.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/61364450965.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/rexudut.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090d46c2c774---52285689513.pdfIn PDF document text
    • http://udelimpa.es/ckfinder/userfiles/files/89786839953.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/makimesawusezifemob.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1626404510.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/59812162736.pdfIn PDF document text
    • http://domusanna.it/userfiles/files/71959851723.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/pv6tiqkqukvav24dvjqidenu1g/33988879818.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/63481594628.pdfIn PDF document text
    • https://playindiano1.in/ckfinder/userfiles/files/65347235895.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/f8ahe25o9dc6glioig8a2qlth8/pefuzusoputaruzinanupow.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf7e3aa880---52688875000.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/6f999dd09462774460714ec0b0f79859/89386886997.pdfIn PDF document text
    • https://goldfieldssanddrags.com.au/ckfinder/userfiles/files/zubikikagotadefuto.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16074c9af756db---72888093148.pdfIn PDF document text
    • https://www.ftha.org/admin/ckfinder/userfiles/files/44997080297.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=loan+payment+forbearancePDF link annotation
    • 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_off0000c4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dcb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB9 17028 bytes
SHA-256: dba328c6c6e6ad9de48196b8df96c4a749a0b4fcfeb4b6f1b5c385213ed06e81
font_02_sfnt_off00010842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10842 10544 bytes
SHA-256: 5374606e74b88c3c15e4ba32efdd7abaef0c6e66ed621cc06f2d97f5484a98ad

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