Malicious PDF — malware analysis report

Static analysis result for SHA-256 26c48e3e8622ebeb…

MALICIOUS

PDF

94.0 KB Created: 2021-07-28 06:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4828524a5594542b46c713d50055c1c0 SHA-1: 2c9558cf008fbc41990008fa4cb4061675feb7e7 SHA-256: 26c48e3e8622ebeb46e0d41bb456d37740998fea2481a42c51ce129eabf0790b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to compromised WordPress upload directories, indicating it's designed to redirect users to malicious content. ClamAV and ML classifiers strongly indicate malicious intent, classifying it as a phishing trojan. The document body is unreadable, but the heuristics and URLs point to a link farm attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baba638464e---45965807184.pdf In PDF document text
    • http://brandiassociati.it/userfiles/file/xevawemozutazuvat.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/74053501576.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb4ac02c98---54073518268.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/ff1d5aecc4f65bc226532d139ecbba2c/natebupaz.pdfIn PDF document text
    • http://happypalettebnb.com/CKEdit/upload/files/revitotivezepizubem.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/79489681052.pdfIn PDF document text
    • http://maduraigarlandshop.com/userfiles/file/jisibutajekawab.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f17563205f---dadosex.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/89923536728.pdfIn PDF document text
    • http://premium-h.info/files/files/vudiwaruzoku.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df66c74c8c6---wuzaxoraz.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/fabuwefave.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160822863ded49---jiwilaxotawananagavijad.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/429b9748952a354452fbd0601a2d4475/30003952329.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/76924638609.pdfIn PDF document text
    • http://htwy.com/upload/file/jodezatobil.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/folojiw.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1e8f8f145---limebibidogojufe.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/98259987588.pdfIn PDF document text
    • https://makeswebsites.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/julovokadoxukalojode.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/c601d51db06307834876927a684fd539/bafizez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=micrometer+screw+gauge+zero+error+questionsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AA 10912 bytes
SHA-256: 302d592033d07bbc866464b03690ea3ba3dfade9efb45eb5fd0f0d9e7f7acb83
font_01_sfnt_off000109ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DC 19536 bytes
SHA-256: 701b9a082cf8227dc6b729d64e941193b397309ca22d7ec853508738756cbb9b
font_03_sfnt_off0001542b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1542B 16088 bytes
SHA-256: 450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c

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