Malicious PDF — malware analysis report

Static analysis result for SHA-256 700a2a2264f2ccbd…

MALICIOUS

PDF

85.2 KB Created: 2021-07-09 14:28:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 02e1f9baee380e589cf671966d7051e0 SHA-1: 15a1623ef8628969e9a493a83f9a75eaa168c6db SHA-256: 700a2a2264f2ccbd48b4bffc40c434bfd1ff13d2cc0145f2512d75b93d389d19
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites using form builder plugins for file uploads. This structure suggests a link farm designed to host malicious content or redirect users to phishing sites. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b3faeecc1---lisebajivofa.pdf In PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2606970a29---tinarozefajawubene.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b9f1f24d1---renosefipi.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1a7d7749e21472ec04bdb0bd96fcfb10/goxugotowo.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/v7dg7c50nn23fs3jd6u1lupq91/9766838808.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/hld9bu3o7rvhfrn4d98n0lgjt5/2130366719.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/50f6e539add3ae825996b10999199048/riwolubimatax.pdfIn PDF document text
    • https://rubenoferro.com/userfiles/file/boxuzenedixodifajube.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/99977175525.pdfIn PDF document text
    • https://renault-service.com/userfiles/mugibedirubijud.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/075278565f9f2017c7fad21058c157c8/vijubofobodun.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbdd391254---77597789511.pdfIn PDF document text
    • https://grancom.by/upload/docs/31354432703.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/87bfe5bc07694e0d90550a3ba42f4338/94280880486.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/a1c9ba37d0a01fc5539ae372918543ed/95355604477.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/9f19050edca1acb10270adc05b769a0a/62437317745.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/k055bi0s42e8vttppav1dfp674/sesivopugokijovikanazexow.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/0f8043e4912ec0a3c67d2cf3e8e22150/95422254037.pdfIn PDF document text
    • https://joebalogh.ro/imagini_ws/61881304275.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a24d61589---fesaledudaworag.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/3d73bbfcc25c8071f2f4b020ae688d28/70495814409.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/e321eb5f60197109fed370d7c0d70b73/supumokusexuzalodotuwa.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/91417688838.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/78960081754.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=critical+angle+for+glass+isPDF 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_off0000ea4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4C 17216 bytes
SHA-256: 1e2ffde05dafa5d2434277951d6371883687dacef964c26502387b0ae4fddc45
font_01_sfnt_off000117a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A2 10540 bytes
SHA-256: 4759dda6005e59a6a6b6a79168a5a67c7588d472d4ebf8185f3b0730c50ce1f9
font_02_sfnt_off00012fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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