Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d6f29cf7ae93e6…

MALICIOUS

PDF

83.6 KB Created: 2021-09-04 07:23:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 74f5e098e789f072db1af9e5aaf806c9 SHA-1: 733906054d598ae7793a5a3ca1597be4c42b0947 SHA-256: 34d6f29cf7ae93e61d3ad8aa7acc404e1e69db9114c3d8ee31a02817c9a10aba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple PDF files hosted on compromised WordPress sites, suggesting a phishing or credential harvesting attempt. The presence of numerous unknown URLs indicates a broad distribution or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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 http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c51c6f313d8---zivanaparifagurubafuriva.pdf In PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/xugatarizasiguzetiz.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/76585895184.pdfIn PDF document text
    • http://anbao.vn/uploads/userfiles/file/32722276618.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/wasemobelebilider.pdfIn PDF document text
    • https://www.natursany.com//ckfinder/userfiles/files/54681859402.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/jolenagojixupamezasajil.pdfIn PDF document text
    • http://sarica.com.tr/ckfinder/userfiles/files/mafirunax.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/i4mslgm842mdnherbfseh1lec5/98138574111.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/fibapinew.pdfIn PDF document text
    • https://dolaodong.com/userfiles/file/wufet.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609298bf33ec6.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/963e4ddc060c88b0c9c69af7c4db0cf0/xefoduxexujotinuwixawax.pdfIn PDF document text
    • http://kunbot.com/upload/files/manajipagafa.pdfIn PDF document text
    • https://balarampurblock.in/ckfinder/userfiles/files/2701018193.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f115128a14---gavoxixofurekalozejavedep.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/ln6lsuuqlibafettss18u4gcd6/gojaw.pdfIn PDF document text
    • https://burkina-businessschool.com/business_school/uploads/file/dugiluxotutuwupugaxijataf.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b562c1a44c5---watusoruwatoz.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8125fc0345---51162094324.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/39547281824.pdfIn PDF document text
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/8937121754.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/293bcf3f87402b2c4dbfae8a07af679d/358847680.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/83868459899.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/cq7m1hit0dud3mdrhn6csor4b2/92593589612.pdfIn PDF document text
    • https://mimpishio2.net/contents//files/6100070645.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160fba0acf3fed---53841182396.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=pdf+split+and+merge+app+ipadPDF 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_off0000df75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF75 10724 bytes
SHA-256: 62422496851620935e930869f5d195b937affbfd69b25ca39b8da86d3e169870
font_01_sfnt_off0000f7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE6 18380 bytes
SHA-256: 8989ec140d9790388ea050edcef60cd10ec70e966fcfbb372d2d50e86fc929e5