Malicious PDF — malware analysis report

Static analysis result for SHA-256 7297ebfc4145e477…

MALICIOUS

PDF

84.3 KB Created: 2021-09-04 02:00:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cbea74f153d067abea84ee08b578dde0 SHA-1: b297211e1ca6d7316962dc6d5bee39c61834f2b9 SHA-256: 7297ebfc4145e477124b80897f30d5bd024e370512807825560aba01abe7b693
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the embedded URLs and the detection results point towards a malicious document, potentially leveraging embedded JavaScript for redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pixomot.ru/uplcv?utm_term=dyson+v7+absolute+user+manual PDF link annotation
    • http://jjkxmy.com/upload/files/202107281003319282.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16091c577338d2---xukimoxujat.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/050e4bcf5566e7ca3fab71bdc692df21/77028692504.pdfIn PDF document text
    • http://maximaviajes.com/FCKfiles/file/xigusuriw.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16102c28795e6a---5406755603.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/23437354853.pdfIn PDF document text
    • https://groupburuemas2.com/contents/files/67218983951.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/xupurejigapusogoxedegab.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/dedidepomibuton.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/sirexu.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/69006104546.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/0e9ab7f4d96c715e737a88366e057194/merozeviludapadanob.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d96a0d8f1d3---62624975332.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/20cf9d759260680649fc3fc79d8687b0/45862269637.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b92164de60d---5582730753.pdfIn PDF document text
    • http://studiomuraca.eu/userfiles/files/ludowiboje.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/d3759de5d881fc59ca62d6f7e3395bf2/xubobumuvuniforiwak.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/nurajubeg.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/2de6a31b5e0adcbebda4553102b1041b/vesegasosemidiwa.pdfIn PDF document text
    • http://daming-school.com/userfiles/file/sukig.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/c7t98hijm8d1vqe5111j25slrf/movurar.pdfIn PDF document text
    • https://bczenekar.hu/files/file/20061166824.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/15335470620.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/c130080ee1a4233d72aae807fab2dfa7/bojigisujepukevejebal.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_off0000e4ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EC 10648 bytes
SHA-256: c2b5eb02d02603b5f0a83a06d92120192bf6fbebc5ba4d9829f6ade53819b4ac
font_01_sfnt_off0000fd70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD70 17852 bytes
SHA-256: 56af48f2d2478fc8c5c1fe0b6fe5182b1c51cc84ea8d33271ad60272b0550efa
font_02_sfnt_off00012b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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