Malicious PDF — malware analysis report

Static analysis result for SHA-256 262da8fb9d12c84d…

MALICIOUS

PDF

93.9 KB Created: 2021-06-12 15:17:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: aa1583576e39cf4208e5afa7ff589662 SHA-1: 4d62e24baab978a2f2c73665db201879e1c23bd5 SHA-256: 262da8fb9d12c84d16b6f14a259f7f579e1ec6b5dc1c489d50f303f31ca5307a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://wastran.ru/uplcv?utm_term=itunes+64+bit+exe PDF link annotation
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16079cfdc9efdd---fuzoletepakava.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/62007311347.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606da07739f28---91630065756.pdfIn PDF document text
    • http://taborcapitalpayment.com/clients/d/d0/d0a3925ee25d0adc8806453b18bccccc/File/16643321445.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/towupubakejoka.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/juxomufapax.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/dd5785b5f31d78cdaded66fc6fd9feaf/62162156383.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/b4vgq08gs88678al4p0l59fu7g/54388220398.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e24cf0ae4f---furusig.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/1pbeoqga3dqhrpjo3ovajrni46/81147377472.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/99864483601d77b3d090dabb70574c51/xodup.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/54693959586.pdfIn PDF document text
    • https://ctapigroup3.com/contents//files/45065489052.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/c79ce8afc0d8d3e3b32edb5bdf63d183/muvuwojovunupinur.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607af0e71ca41---xomatudiguxubatodom.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/1a3fb4354ddae72757902235793f0bac/51895510221.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb2cc5737e---64598116029.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/ba5bbcba05c14716c0e6bf7b000a5bb6/zigebowuduvigepu.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/42209649201.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn 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://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF004 5684 bytes
SHA-256: 27ada764e9c24f04a01e9e9d9146e8eea389e9e59a46f2998ed8a69d74aac4d6
font_01_sfnt_off000103de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103DE 4728 bytes
SHA-256: 672d8437035d3a5850b8b0f3cd14358a80f5a19fbe9a57c5503c879bc9a8035b
font_02_sfnt_off00011408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11408 6148 bytes
SHA-256: 488ffee5e9c33bcc1f3f00aec749f35977d0cdd209ffadaee35194d66ecc177d
font_03_sfnt_off000123e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E8 15364 bytes
SHA-256: a8c76650d63ef2ddce1ba749cd51a4678e5953c53f2ce38fd93e80d8440bf869
font_04_sfnt_off00015123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15123 16984 bytes
SHA-256: d3d87d813a0653b335a429fd00964e933db16fa1a6f53bfe974070cbfc27f698