Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e05124f1bf971e5…

MALICIOUS

PDF

83.8 KB Created: 2021-07-03 07:49:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 2d8dd39ba26c9ba85eafe984aa34325f SHA-1: 10099ecf8d6f206c67f3fd17aa273a758a030c0b SHA-256: 8e05124f1bf971e5a6aedb8f04c7c0db233e8d2d5adf8ee821e488f5b370a2dc
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 it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these links. The file's structure and numerous external links align with techniques used to redirect users to malicious content.

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 http://thingsantiquesla.com/userfiles/files/35345337851.pdf In PDF document text
    • http://jjmcp.jp/userfiles/Image/file/xaxolotediwamugoxa.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/d1gjjov6v0ucmt3demgu696nkc/80478904331.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/5bdb0d16adabfffd7b9f9fdf1874b06d/36207368301.pdfIn PDF document text
    • http://amon-syotengai.com/userfiles/file/37450248828.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/195219d68675dee337925d8d3ebe14f8/51293082091.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/6263260352.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16091232533ee6---15891190149.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/giwinigoderixuwoton.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160715f44ad7de---surosa.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160be309ccbd7d---15578756482.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9a985e51d---ronafonog.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/18kkvsk8br08pm31fr2qh8d1ss/zefido.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e21b28317f---91599345456.pdfIn PDF document text
    • https://turbooto.vn/upload/files/robarofazife.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/lufim.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/1f0ad323bd014add3464e3c031082a4b/67523101983.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607584cd4651f---kidevukivoretasamiveburuk.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/otixojexel.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/b74eb0506e024e6a73ddeefb71274980/63000388163.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/xoralulib.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/40a972a00fbb275371529d3b69f69418/nogusixunaluwokilipo.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b54b1459685---nakuzenebinegufi.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/96903327203.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/ef0c318f0007d961e03ceb67922f71f2/58224975403.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=blackpink+roblox+id+how+you+like+thatPDF 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_off0000e2e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E4 11128 bytes
SHA-256: 5ce1f3546d5fe153cc5b22732f40f568c359a540dc128296a5b19bb39f9e83e6
font_01_sfnt_off0000fcad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAD 17312 bytes
SHA-256: 6d7e81a6e31b09a123778c258f566df633567b77c5912a2da5ccb4b41a827a6b
font_02_sfnt_off000129c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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