Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a9a512cc2d85c40…

MALICIOUS

PDF

88.2 KB Created: 2021-06-30 10:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2ef920136b667629ff3b0507062b8e7f SHA-1: b11aaf4c8549813d968d4e5f2c06cab1c02e7af0 SHA-256: 9a9a512cc2d85c40f05ab5e02eb55aa43fdc55d52d881dd7b1c5a620cc6d47ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains a link farm hosted on compromised WordPress sites, suggesting an attempt to lure users to malicious or phishing content. While no scripts were explicitly extracted, the nature of the link farm and the detection suggest it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160be909fa85bf---34952642273.pdf In PDF document text
    • http://travelsi.ru/ckfinder/userfiles/files/vedipusotuf.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/100f55804d6907d6dbfb78c689bc44c4/47298317525.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/nefubosijo.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ca777126d---44985911332.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/e4dd13b400367ac037eec73311fe41c9/44351762583.pdfIn PDF document text
    • http://ahsaipu.com/v15/Upload/file/2021511831257479.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/60732335250.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/3e371607c9573a1a55ef4c5a7461a140/34441563314.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/14619408781.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/e2b6e0170626c0ecce9ddfd37b0eeb06/zaxusekesadisojemodunirof.pdfIn PDF document text
    • http://taxicityplus.ru/userfiles/file/wudenatur.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/titumipitepopudugataki.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/jofagizunefugikebimo.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/tv7pon3r52oiogohkie57pdm60/53667681399.pdfIn PDF document text
    • https://telenovella-bg.com/files/44622219452.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ff9741505---12001762434.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cddae9199b9---xuvirapuwomizasude.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/s3dtb93ogmo7mp6q02dn23v9kf/83113804947.pdfIn PDF document text
    • http://otohondamientay.com/upload/files/75892859273.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/160789b1c7b890---4823017001.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/1d00dc37c79db977690cf4e765012eb0/93753772536.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/532dc98445acb0e3bc20c789cefef9a1/litoponotonevarugus.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4d3caabb17---kokozijujo.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/e948ab317a68c5c410dacd0067d38c17/47714348155.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/7dbtf8jfuob6datfvtll84s00i/5806616976.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=solutions+of+physical+education+class+12+saraswati+publicationsPDF 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_off0000f2ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AD 11404 bytes
SHA-256: 5217b67befd2c25a2eda374660dab78a7270b878d3ad17501d11ea16480dab81
font_01_sfnt_off00010d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12589 17284 bytes
SHA-256: db1fa2d51c6dd7993e45f0dfdbd496caeb052c86ff873f51db52c1c62b089430

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