Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc3194c76ea2eadd…

MALICIOUS

PDF

77.9 KB Created: 2021-09-03 20:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 58ebcd4c8a4d837cc7eb6646b7e1c826 SHA-1: 044e5e59d87ece70d5863db0fcc31a0947699503 SHA-256: dc3194c76ea2eadd00935097fdd2f103dbc1b6bbffc4d5ace5c8aac956d8ceba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which appear to be hosted on compromised or disposable domains, suggesting a phishing or malware distribution campaign. The PDF structure itself is also noted as a link farm, further supporting this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://coretry.ru/uplcv?utm_term=marketing+strategies+of+coca+cola+pdf PDF link annotation
    • https://nevisnews.com/userfiles/kovajifam.pdfIn PDF document text
    • https://apc-algercentre.dz/ckfinder/userfiles/files/17143912994.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b06ccc8e73a---53178986761.pdfIn PDF document text
    • https://tezerwatch.com/file/upload/files/08-26-21-20-28-15.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/jufiwe.pdfIn PDF document text
    • https://castel.ro/userfiles/file/54118350634.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/d44f8a8dec0c13db5e666707a4bc0aee/lujurezumogur.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/fogewinijopu.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/1qka918lk2n1kjs8273gg438t3/42309902922.pdfIn PDF document text
    • https://kipass.fr/userfiles/file/binagekuzuzazomozimevago.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/35802c085a0f032c2f5194a4163514ab/11024778314.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/010904206601.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/27bf8e972f0f49141ffe10462b9123f0/1957966866.pdfIn PDF document text
    • https://aljazeerahpetroleum.ae/userfiles/files/60239374032.pdfIn PDF document text
    • http://aweibel.com/Photo/file/2913878360.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/0d5d82c3ee9875d93c2c44e7ec60f5fd/66817632399.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/f65s2rckhs18jbh85lagballnt/monekudu.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/613b1d54cafa5c69e66c464877f79ef5/92695249608.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/lalomubejitaziderusalum.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/0j97qcfbmfsitt5gvmgs2n9236/89141332893.pdfIn PDF document text
    • http://elcolono.net/userfiles/files/fopewa.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612611031d324---88717477547.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bdc6379123---80004016027.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160901533e93c9---romasesema.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_off0000ca24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e23b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23B 10880 bytes
SHA-256: 5f1eddf6f67a3bc152659ca8b5b35f0fcecbe182108630f159808563074ddec1
font_02_sfnt_off0000fb4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4F 17940 bytes
SHA-256: 9ae98e16d893c1fc0bca2e29d2342c4fe0e151538f789513abbb9e6c82db066c

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