Malicious PDF — malware analysis report

Static analysis result for SHA-256 68df2df562b942c1…

MALICIOUS

PDF

89.7 KB Created: 2021-07-31 19:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d152e55b6af357d4f458131ebb1acd18 SHA-1: 740c9abc62440e0d856ed2f762586b8e0d0a54c0 SHA-256: 68df2df562b942c15ebb2d34b704cbec47db0514a2f2380ed7fcd5f39a5eedc9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting it's part of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c4ee631fb4---ludakuxinupuxolosazi.pdf In PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160811998e7b4f---21617970851.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609c62414444d---newifebaji.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/tegilezomurafixik.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8373bd9c9---87761660466.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/79956f768b2418ea7e03c282702f4467/88416559917.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f2bf892c0---32648030892.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/razix.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607db64cc6fed---tuxavebojifinekogap.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/86269581416.pdfIn PDF document text
    • http://csc0535.com/userfiles/file/20210612063353_g06wkk.pdfIn PDF document text
    • http://smakbyala.com/ckfinder/userfiles/files/zowolujafajebozexorowaj.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba0bd7b028---wofunowigorokeki.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c79794ce35f---fodafusuloz.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c037d61a---kaneruveluvafuzodel.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/jejazoru.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3cf92b213d---punodewopimazukiwinigufi.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/vixozeki.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021053016473673499.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea43715ec3---18315485658.pdfIn PDF document text
    • https://led7.ru/file/zuzakoredubut.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/64837239644.pdfIn PDF document text
    • http://phpirateboosters.com/clients/867602/File/gedalajakudadoluleku.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/15540858891.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=convertir+de+pdf+a+word+gratis+en+espa%C3%B1ol+fullPDF 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_off0000dd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B2 11164 bytes
SHA-256: 51d179733d89b714a28581c54b4f0efccfa59479be6b06ed42a85d655e2b7a2d
font_02_sfnt_off00010f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F90 18652 bytes
SHA-256: 9ef687db0f28c510794bdfd97e86d377ebfdecdd134711295410e1773f62c641
font_03_sfnt_off00013f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F7A 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd