Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee9499ef85947f4…

MALICIOUS

PDF

78.5 KB Created: 2021-09-07 10:13:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3c38c0f774e5e357f759d1aede449878 SHA-1: 1479798a5d2ade490bee7f323a33e2162010e763 SHA-256: 7ee9499ef85947f48e9b419111a587753fea50c6d391fdaa9b639ee4d208deaa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs pointing to various websites, many of which are hosted on compromised CMS platforms. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links, suggesting an attempt to obscure the true malicious destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://garglob.ru/uplcv?utm_term=insensatez+tom+jobim+pdf PDF link annotation
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/46a927876f3fa91c52068ca676626fe6/jitutipipijuzemiru.pdfIn PDF document text
    • http://saigondome.com/uploads/userfiles/file/43426599723.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/2a42f8765248a662dc26fff8fcd7c5bc/45738040918.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/g562fji1iave4qg2dv98l8q872/jifomusiduziwigebemitov.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/mafejibuturumejobevuped.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf730b3904---48638374762.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/at1efue0pfe897jgivicsquqn9/50498174019.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/496c9ed10f9339d8f944df3d60fb099b/guxewame.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/kudazipoximapofibe.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/30045310590.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c07b690ec4---31335640028.pdfIn PDF document text
    • http://granite1962.com/clients/869125/File/zikore.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/703fb58f581785fa314870d20e2e2d7f/tozodu.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b73f05a50e---16491405270.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/71925911997.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202107file/2021072512570670554.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/96991472072.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077974e3fb49---78708445721.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4865387510---75099359988.pdfIn PDF document text
    • http://coumert.com/images/file/30940838627.pdfIn PDF document text
    • http://bsp-oblspl.org/ckfinder/userfiles/files/83469245892.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/kamufarijunujuxesobibaji.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/refobazikiwutibewolelolo.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/53051792428.pdfIn PDF document text
    • http://les-dvorik.ru/userfiles/file/28792861746.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_off0000ca75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA75 19240 bytes
SHA-256: 766d51287e353c7982d78bd0f3180e9f591441a9e755031ddc42b15d6abc9771
font_01_sfnt_off0000fbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF7 10792 bytes
SHA-256: 021a0eaf018f7437cb52c7443c433b3407c346c99fc908a14789c8de51445a88
font_02_sfnt_off0001149e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1149E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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