Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee8a03cdc4d464d…

MALICIOUS

PDF

82.2 KB Created: 2021-09-02 10:37:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 33657f3f16b13b58071aab8b738117a8 SHA-1: be38c0b09a0aec68399bd128272ed1a8b9c5e596 SHA-256: bee8a03cdc4d464d9af1f00fd68238f6009ca0cbd2f3f128cc45ce28e6efa30b
156 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to numerous URLs, many hosted on compromised CMS platforms and disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document's structure and URL patterns are consistent with a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://catamma.ru/uplcv?utm_term=real+christmas+trees+cape+town PDF link annotation
    • http://captaincook.hu/userfiles/file/lekuganivariduzedutote.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ed254109f---fuvitinudiginimuperegawel.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/dc7669d9bd8903dce3b3712d5ed51642/8764299125.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/vefefasuv.pdfIn PDF document text
    • https://charterfori.ir/basefile/charterforiir/files/45317922664.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/sezuxewekobukuwop.pdfIn PDF document text
    • https://rjpexport.com/files/watizukibew.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b167791e4---14114259658.pdfIn PDF document text
    • http://eis-pieschel.de/UserFiles/File/dotowosuf.pdfIn PDF document text
    • http://uitetenindex.nl/images/uploads/49458649252.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/t5ceuhn5ufr493opfoahf4st94/96301990274.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/8f53de9f95739ba51af7deb09148d5c4/18199159283.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beff330774d---78468792906.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/ruxos.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/64483910897.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/d37e3f43cf0df9486d5bf6ac3cd43a5b/tejusibixazotowudasogut.pdfIn PDF document text
    • http://www.ks-klinika.ru/ckfinder/userfiles/files/77673629635.pdfIn PDF document text
    • http://washburnhs64.com/clients/f/f7/f75dc469904bb25755ea64d7551c4a95/File/60645055377.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/rexefuj.pdfIn PDF document text
    • https://dhins.com/testingsites/advantage_aviation/assets/media/file/76810324481.pdfIn PDF document text
    • https://sp-pir.ru/wp-content/plugins/super-forms/uploads/php/files/a1144e3237a2fd55cc02e234645159e1/fijikesebun.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/43298094072.pdfIn PDF document text
    • http://derma-dts.de/files/file/ranajojavuvetavuxezeb.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/25509632322.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/file/90215382020.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/digademapupuwuv.pdfIn PDF document text
    • http://vhs1962.com/clients/b/b9/b967f936f519796c2a696a6ed1da67f9/File/93723986206.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/sorozusiv.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_off0000ddb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB6 10768 bytes
SHA-256: 094d7378e57ca651160443d08ca10b06f08f46088cd2e84bbe2a6e91cef229eb
font_01_sfnt_off0000f65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65A 17392 bytes
SHA-256: f97b1d11d974d8d4074431a27e5427d1c99aeda7bda637062403db738f5ba953
font_02_sfnt_off00012308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12308 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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