Malicious PDF — malware analysis report

Static analysis result for SHA-256 86fee69c48487889…

MALICIOUS

PDF

78.6 KB Created: 2021-07-15 17:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 56976dbb8691b81eee09d65c4eb4b9fd SHA-1: b6990e5c143ea7a858ad8d605505ca746233581a SHA-256: 86fee69c484878897002a55e337c4c45f64b46fccd7212071e19dd194230bc27
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1108eefff---89507103732.pdf In PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/1gogj5sdca5rnbuliml8s1jh1b/71496989464.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609287d7ded54---wukifekigoragamawogatapu.pdfIn PDF document text
    • http://schmetterlingsgaerten.de/file/vobewad.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/mofakorevulereromureto.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/87614552861.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/b65515d03a4d451690f5e53019745d5e/bivaronufuxazakepabirejo.pdfIn PDF document text
    • http://accronline.com/userfiles/file/detagipalalexamepiz.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160dec3f17e998---50100457328.pdfIn PDF document text
    • http://www.asslar.de/downloads/wewedefawesi.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/fabanit.pdfIn PDF document text
    • http://leebyenghun.com/new/upload/board/files/74714304757.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/71708698212.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/fajuperutazojolowokalozu.pdfIn PDF document text
    • https://art-eria.pl/mandarynka/pliki/files/6172887243.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/29a86b05cd8095db63206e9d3374e415/62498379361.pdfIn PDF document text
    • http://associatedreclaimed.com/userfiles/files/87590571976.pdfIn PDF document text
    • http://cityhigh78.com/clients/2/2d/2ddbae4fb74c169819b3574d76e4e264/File/pasaposejojive.pdfIn PDF document text
    • https://golf-tout-terrain.com/publish/page/file/mimutodeninalixisakosa.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160788d376d250---pejimutif.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/3882e0cdfa57d6b7e74716f72c922404/27861185070.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/39392321849.pdfIn PDF document text
    • http://erbaytag.com/resimler/files/46695567868.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609411f35e323---26597227982.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/kixewaretutusu.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/39583077827.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=sql+group+by+examplePDF 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_off0000cffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFC 10812 bytes
SHA-256: dcb4d5ea7e16cc75583649645d9abb42695ff6ae7ea05d8bb730979260212b82
font_01_sfnt_off0000e875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE875 17064 bytes
SHA-256: 1eeb89fb3f1cafad5546af64939d0934ff6d8c3e5b6f90a83ccbd3bcce096cfb
font_02_sfnt_off000114fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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