Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e1caf4c9f916fac…

MALICIOUS

PDF

92.1 KB Created: 2021-07-18 06:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e4be9ec7265a8a77094cddd810f515b0 SHA-1: 12ea15b73f32887c39adfe9d372485f4f5d4d236 SHA-256: 7e1caf4c9f916face5d4c50c25ebdb3f3d074d724f7cb402b61c6dce01d31e36
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to compromised WordPress upload directories and disposable hosting, suggesting it is part of a link farm designed to redirect users to malicious content. The document's structure and embedded links indicate an attempt to disguise malicious activity as legitimate search results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/4c0ec5ce90cd0ea3be47561589bfd40a/79256698919.pdf In PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c70586b157b---bulebitixu.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/xefewexunubutobasawo.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/39534a98369f6552a3187949caa6530c/80975009733.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/e3nouk661jlpuh7bm9h1jje2jf/52037906463.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/e77a315830e9d28952c27a5a36d843a1/jipatixuxupuwa.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/xiriwitufuragipematar.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/jjqm7fk8rjhqim372fu6ed1u7k/89398026408.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/43d1296fb2d331d3813e598ceaa69fad/78755507090.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/xokuvitatozebotovutepaxa.pdfIn PDF document text
    • http://thankschicken.com/uploads/files/30675786837.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/44005074791.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/sibuno.pdfIn PDF document text
    • https://farmacieitaliane.com/documenti/file/75806153006.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/64269494093.pdfIn PDF document text
    • http://cpbnatation.fr/fckeditor/userfiles/file/miladapo.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/28051369618.pdfIn PDF document text
    • https://grnca.org/img/files/files/86422959448.pdfIn PDF document text
    • https://clap-bas.com/userfiles/file/32055417163.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/b789hled86hmpn76mkkcfag840/41912334977.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c949388a553---lamotoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+read+others+mind+pdf+free+downloadPDF 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_off0001058d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA4 10840 bytes
SHA-256: 5f87b5c99863cafa16569c9d7b0510776e08dd7115e6611d29915c98226dfaed
font_02_sfnt_off00013670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13670 17648 bytes
SHA-256: 751abb12ff17fb9b14d99e56962c893febf886869c1e8699ccf59d42f11d4267

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