Malicious PDF — malware analysis report

Static analysis result for SHA-256 02101bccd1a2e50c…

MALICIOUS

PDF

115.4 KB Created: 2021-09-02 06:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a9c1cd810eddf6a40f54e94a4c4c0fb5 SHA-1: 2a7747669b1081663bc3e4541139f78309a5fae4 SHA-256: 02101bccd1a2e50cda5f6b649b195fdefc17dab3c148ef0f7fe38859155a1744
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://turagent007.ru/userfiles/file/76420150188.pdf In PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16079890d78a1f---benodepizakimim.pdfIn PDF document text
    • http://fpole.ru/sadm_files/84966622008.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/104e2392adfedf5d72c62b6ab23cfced/wunidaronopudibulunaluse.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/33689460582.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8719530a60---zetikopedi.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/75731450517.pdfIn PDF document text
    • http://indecomavo.pl/inc/nufelowadosijamomatoxizo.pdfIn PDF document text
    • http://www.ferm-matic.fr/upload/file/jifovadefisasosexel.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095e88787a22---23142470055.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/95790942926.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e414ace80---81583845793.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8c9e51be7---vulatigajelar.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/75489243046.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0f1f4fc7d---dotipexebamoxolis.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/7987788788.pdfIn PDF document text
    • http://abpaluso.com/upload/file/14848312327.pdfIn PDF document text
    • http://istanbulballoons.com/ckfinder/userfiles/files/81958920241.pdfIn PDF document text
    • http://ongnuocdenhat.com/upload/files/fanudemiwuredidonojabez.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es//ckfinder/userfiles/files/88527477122.pdfIn PDF document text
    • https://szallas-karpatalja.com/upload/55172225936.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ph8qkmamir47cso9kp2tjqpam5/kuvaxumubitexozog.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/b7ecc43bfa76294a62db6fa16100d05b/62186208890.pdfIn PDF document text
    • http://studiosiriosrl.it/userfiles/files/4114827061.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=come+here+girl+come+to+the+backPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/20070049243.pdfIn PDF document text
    • 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_off00015d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17537 18840 bytes
SHA-256: 3a7945bb894668fc105ae88053f1341fb2e2508bad0d205847493c6cdfa65ef6
font_02_sfnt_off0001a668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A668 10668 bytes
SHA-256: 74952565e6fe29447736da3e682df8f49cc23153e2fd5edc3d6951ead0ac6d6c