Malicious PDF — malware analysis report

Static analysis result for SHA-256 2de9cbb15c4b680d…

MALICIOUS

PDF

70.8 KB Created: 2021-05-10 07:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 529858b2380a037c1ae3b250d88e5bb0 SHA-1: ffd6d3141bc7acf5ca135256ac75d0ae1e99ab4b SHA-256: 2de9cbb15c4b680dc89d9bd46b2a498213f1f8a7135f3e7bc4f4479ba4178f01
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of embedded URLs, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and appears to be a lure related to 'Articulo de l carnitina pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://inwebjor.ru/uplcv?utm_term=articulo+de+l+carnitina+pdf PDF link annotation
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608275a976d4f---91671362414.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/3k9i8ijvfh81t6g6t9bs2f17hg/nagimulerozetir.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/044b34447910f86ea8c451254e087bf1/movetawafukirazedulatesub.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/73544735580.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/d7a83b1131476aba917e7bfd997bb6d8/80984309681.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccb68cdcd2---99860814694.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d599eea4cf---labitujitejufut.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5aa150f50---90230793185.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/55c02d7888a33a7fc0fbc547f7b86781/30630002771.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607c499318231---54648864723.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160894b4793ff4---jidukuzigidejuzar.pdfIn PDF document text
    • http://teraval.cz/res/file/60516125928.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/47ec17de77470ef84c51aec8b119f264/xedozorilel.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606e6e75897f5---40600289765.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/vulekogugelavelugad.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/573fb271f71805c668bf4bb6392106a6/fojimu.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/20eb75ca1bfced7319ecee17517e70bc/964060216.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16088eedfe30a9---kojelu.pdfIn PDF document text
    • http://www.bash.cl/media/file/duremud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46C 4960 bytes
SHA-256: 49583cd3a945506d6e23152bef4d897ed6f117dc51790601592481dced04883c
font_01_sfnt_off0000e560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE560 12120 bytes
SHA-256: 050f0ae274c5580a4fcf21ef3f32a6cf110cb20f32689da12642571f078c7b10

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