Malicious PDF — malware analysis report

Static analysis result for SHA-256 95eec2ee264f7a95…

MALICIOUS

PDF

85.0 KB Created: 2021-09-23 16:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9cf84ef196a62e463bf2df4635e95c61 SHA-1: b453a558473715a8ab11e62461a8b4d6af530c8b SHA-256: 95eec2ee264f7a956dd355515ca065f5315844d67cfa1b6f8525f43390b4c40d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/lelijomigop.pdf In PDF document text
    • http://www.teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/rederarusegugixulagek.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16132116768856---leguzi.pdfIn PDF document text
    • http://imdad-egypt.com/userfiles/file/rejamesuvowegadusu.pdfIn PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///romopotirapogilut.pdfIn PDF document text
    • http://dealershop.es/userfiles/file/17781613530.pdfIn PDF document text
    • http://cornaredo.gattinonimondodivacanze.it/themes/userfiles/files/nepuxobijosifurabetajen.pdfIn PDF document text
    • http://hostingureitings.lv/uploads/userfiles/files/voriwabebolaforosun.pdfIn PDF document text
    • http://www.armstrongre.com/files/files/44176754040.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/minakugalumadazotegow.pdfIn PDF document text
    • http://kutyasturak.hu/images/files/48598768408.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/161412d91da48c---70370717232.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/bakirawarer.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/161475748e4b86---vowofilu.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/1c3olutp46s0kukn8f3d8c960d/kilizuvelatuzi.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/bedirosiximufakigadatepo.pdfIn PDF document text
    • https://mar3ol.com/Files/files/57171083783.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/89359513670.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/kaxunasobowizaj.pdfIn PDF document text
    • https://netkat.in/ckfinder/userfiles/files/xeziladenike.pdfIn PDF document text
    • http://mengnuanua.com/app/webroot/files/files/51392852985.pdfIn PDF document text
    • http://emanuelarombiarchitetto.eu/userfiles/files/42905651937.pdfIn PDF document text
    • http://unibox.lv/files/text/71272180259.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=fillable+pdf+character+sheet+5ePDF 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_off0000e6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F7 10744 bytes
SHA-256: 336fcf3eb58e0bfd39abcf45c898ebb2089f89e85203528717221b86930f821b
font_01_sfnt_off0000ff91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF91 17980 bytes
SHA-256: 3ea49873b0b4601158af006bf7308a704889d8460e317f1ad0b9b8fb18c516f7
font_02_sfnt_off00012e14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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