Malicious PDF — malware analysis report

Static analysis result for SHA-256 7475cecca17ec000…

MALICIOUS

PDF

91.6 KB Created: 2021-09-15 17:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a411f07c3d8bd4bf84999158089f6f5f SHA-1: 2b85ac637c2e5dcc4e924981271737faf951e21b SHA-256: 7475cecca17ec00053ee8df0a44c641ab120f245c0d3e077b35158ce56a5aebf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that function as a link farm, directing users to potentially malicious or phishing websites. Heuristics indicate that these links are hosted on compromised CMS uploads and disposable hosting, suggesting a deliberate attempt to obscure the true destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 http://ardeche.proximeo.com/ckfinder/userfiles/files/13261363526.pdf In PDF document text
    • http://wecans.net/_UploadFile/Images/file/12535532581.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/vobozepogenenolulofopuw.pdfIn PDF document text
    • http://frutapac.es/ckfinder/userfiles/files/wepepubilupisofuvuvize.pdfIn PDF document text
    • http://russia-ex.com/images/blog/file/60723264487.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/japeboled.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/28502464658.pdfIn PDF document text
    • https://cosmeticdermatologymiamibeach.com/uploads/data/files/75471676984.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/98638359523.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/89745472743.pdfIn PDF document text
    • http://dycelife.com/userfiles/file/pexigaraxozukovurepe.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/kelimugukezotezewakene.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/66494761660.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/rogaluter.pdfIn PDF document text
    • https://kaparatt.com/images/File/50027470383.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cf793399f725d9bea24a61fbc13404ce/26410246128.pdfIn PDF document text
    • http://mfcpavpos.ru/file/tiwakapemodas.pdfIn PDF document text
    • http://goldendazzle.com/upload/quangtri/files/49844155375.pdfIn PDF document text
    • http://pluimveebeurs.com/userfiles/file/24768788226.pdfIn PDF document text
    • http://riph.pl/userfiles/file/zodezusisug.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/4167270925.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161371f4f53cf4---pukopava.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6dbcc32ff---rilukulolulale.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=bottle+3d+gamePDF 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_off0001017b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017B 10352 bytes
SHA-256: cf632cb02875b0f22d053d8817ab7efe13f2d7adff5b5929c490f46f8c8333e4
font_01_sfnt_off000118b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B8 18412 bytes
SHA-256: 1f30d29cc2fef1958ac08910cd1471d60163c6e68357d6a697ddd93d3d7f7304
font_02_sfnt_off000148f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1