Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b421af9b5b45b65…

MALICIOUS

PDF

83.9 KB Created: 2021-07-03 15:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9018011d018b36b3113bfc0b3c57070a SHA-1: 7032853b2d868017c5b54c2391f88d2282ce071a SHA-256: 2b421af9b5b45b655a7845f485185679212ee78e571dc7555c1f03fb05018212
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to what appear to be compromised WordPress sites, suggesting a link farm designed to lure victims to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://oniceh.ru/uplcv?utm_term=renewable+energy+a+first+course+pdf PDF link annotation
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/9bd223274a0029bd7836a8807785f0c3/gorekatodadosis.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd9112fccf---gozitizawakifex.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608145d4c98c8---domazovosag.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608414fae8e45---tisakukora.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/5ec9a31f63bd71fe93e08aef0de8c171/47184456461.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/wemowesodowaruvelije.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210626010407.pdfIn PDF document text
    • http://kimyasaldubeller.com/upload/ckfinder/files/85527018616.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/86859184487.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/xetemala.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/6247daf38e218022290574b97c2d5a4b/54052173126.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/7e2b4221e271e0b0598a81a98c97197a/47170338665.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/54367278524.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16072d2e8a1634---suxofasusigurabupi.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f20dd0086---84606356129.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/1amt58qcgtac8vg0q6jh5roup6/15115117178.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078c1c92a8ba---foneroliporulazis.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/43283172805.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fe275489b---mikuxijazosabiliz.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/pevafowoveborigekez.pdfIn PDF document text
    • http://zxsolar.com/d/files/93025300834.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607908bf9759f---62473197272.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/16099d3a377d11---63117948371.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e48b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48B 16668 bytes
SHA-256: d3ccc9a3b2247cc11fb01223ff7db52e1d6edf0b382062ed60c7bdd1e58141c2
font_01_sfnt_off00010ffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFB 11280 bytes
SHA-256: 5037971e79d1c51538df2ce46f2a366a3ca73fc7cc519c867bc9a0a544d03945
font_02_sfnt_off00012a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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