Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfac927c76596cfb…

MALICIOUS

PDF

85.4 KB Created: 2021-07-14 09:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 16bae2d1ff904b5e630344b1ad3ea575 SHA-1: 2f0d49fcdee878594b318a55c698f434df0b9d4d SHA-256: bfac927c76596cfb1e11d5c2a4ddadafedf6f053cea4b2725a674cce306cd3de
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for executing malicious code. The file also functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. These links likely serve as lures for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://irlanc.ru/uplcv?utm_term=benzocaine+on+canker+sore PDF link annotation
    • http://www.findvoters.com/userfiles/file/67914838463.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/a5780a0263daa615d0e7ffc88f72d81a/58179874307.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/liwajosuritegavirez.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085adcfddf0b---bemomirezuwojuta.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872cf013be3---87656398282.pdfIn PDF document text
    • http://ncabhsa.com/clients/875427/File/76970691651.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/fad60f8e93cb55142413aa89c34babab/30685269190.pdfIn PDF document text
    • http://gok-maciejowice.pl/js/ckfinder/userfiles/files/libadefetubop.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/finamulegedom.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/rub0rqqujhqqrt3pv9hfd4iap3/mixojukexoxivalusab.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/fugilerolu.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/5744970033f23979349ad1afae7277ad/57834111041.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/368c86a5bfdeb5307e69f065e956f334/46661551393.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/e89401828aa2d29f8a6350103716aec3/mewaxa.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/59480183917.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/7cd190b5da6a794dc375389f74e097f1/zagorapimavubuvupolebi.pdfIn PDF document text
    • http://hpc1970reunion.com/clients/3/3e/3eb4c5728feca7eb79feed4eed44c519/File/68545563020.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160727f9b6f054---netubapuzojodo.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/fe168da3d6950d1475c27945138f1045/69805227471.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8472326da4---tekawok.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ee0150b33---vitaxuw.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/14475184489.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/7402748175.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e539edb7a89---61181591796.pdfIn PDF document text
    • https://tes-sys.com/uploads/ckfinder/files/20210713/16261258968047.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_off0000ebf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10404 17392 bytes
SHA-256: ce937b005633b25c6acac6603be83506c77719b24a772bbc32611429359959da
font_02_sfnt_off00013127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13127 10284 bytes
SHA-256: 3f5599616b00259af076e5fc81f52587732aac4cb2c84132be8c1bb5059cdd9b