Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ec6ec515ebeaea…

MALICIOUS

PDF

80.7 KB Created: 2021-09-06 07:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9fac9ba4359faddde2008cf1fdb763be SHA-1: ac3ac9f1a928b2bfa59f0a4014394e88f9a33cc9 SHA-256: 09ec6ec515ebeaeac1e7a0118204899336d7b66b18e402b9d6b8ca582d1b9edd
156 Risk Score

Malware Insights

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

The file was identified as malicious by ClamAV and an ML classifier. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting. These links likely serve as lures for phishing or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098e8d09c995---35968013986.pdf In PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/41551093691.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160fab96cc9580---82682417041.pdfIn PDF document text
    • http://professional-tuner.at/uploaded/file/zuxexosot.pdfIn PDF document text
    • http://dzbnf.com/upload/file///nevopinudokijosugawule.pdfIn PDF document text
    • https://www.cylinder96.ru/admin/ckfinder/userfiles/files/nuwuzi.pdfIn PDF document text
    • http://chsbicentennialclassof1976.com/clients/c/c2/c283bfa2537a82fb79a670aa087b4bd4/File/regejunudawupo.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b10edb0f82---sigovaruf.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2c88e7deb1---keropozezukugubukugusopu.pdfIn PDF document text
    • http://ecoevopublisher.com/files/upfiles/file/lanim.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a865f818a05---69109718151.pdfIn PDF document text
    • http://rentappli.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/37904198560.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/304899f68c538e8607b6b3e3f0a846bf/fotubemuvev.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613465c73d6c3---17685455957.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/laxofixijujegifal.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/c0239622c2fffc0aff5d897a6eb5b708/rujaxigitiwe.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1706a1eef1---44401845820.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/223cb8b38c654c0495dfbd684cc7108d/jabivozemazovodududepofi.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/tupivezifedivabe.pdfIn PDF document text
    • http://delfosventures.eu/userfiles/files/32791397871.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__60D7B91634BB9.pdfIn PDF document text
    • http://skisun.it/userfiles/files/94113414917.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/mowudexugogutuno.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=havells+ceiling+fan+price+list+2019+pdfPDF link annotation
    • 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_off0000d84a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84A 11192 bytes
SHA-256: 0b7f529440bf526df6f0431b83db99d7c3f200b1477c3151bb82f9debdf29e62
font_01_sfnt_off0000f275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF275 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A87 16728 bytes
SHA-256: a1b8f929bd47d26f8242f4fbe97ce25f811775e00f4d15d8ae242e1f9dc9686b