Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe7f4c7d0192c75…

MALICIOUS

PDF

78.6 KB Created: 2021-09-01 08:35:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a9baef15f6930b4df8b2cd1805ab01bd SHA-1: 7918f2cf4b0c59fa4366511285eef91f3fad4cbd SHA-256: 6fe7f4c7d0192c75142c461d4b4c78efe5cbb9701ba9141b5f820b02a9cf0366
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links pointing to various websites, many of which are hosted on compromised WordPress installations or disposable domains. This structure is characteristic of a link farm designed to lure users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://a1-recruitment.fr/v2011/Files/fck_upload/file/tibunoba.pdf In PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e9a99b5c1---navemuxogegawojikigavug.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607d396a7dacd---wetijubikifeto.pdfIn PDF document text
    • https://enilubricant.hoakhanh.vn/uploads/image/files/17532865333.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/161086c3cb56db---kawolefuruvopozadi.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bf536cbfc3f---9556242075.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/m1v8h7obmodaq2kng33af2157q/69857497113.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/fewop.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082cf06cf4ba---32833705583.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/6vhkfl3lne99h6mc306mo0ihep/buriripixopimusuvegujit.pdfIn PDF document text
    • https://ukmalayalamnews.com/userfiles/file/30163825716.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/tilenolilelibebaxaseved.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/fijujojexez.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/13fff944b05d690b086eb7a538f5fefa/51525942377.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/kovikozajifu.pdfIn PDF document text
    • http://cissi.it/userfiles/files/ragebixofubapupude.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/2ad0339154430d1fc387f8286d6029d0/doxuvorage.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/turugulakebunumutavurosuz.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/pitososesazejagadat.pdfIn PDF document text
    • http://cp-tournament.org/ckfinder/userfiles/files/luwufoseteterafivorumakip.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/07bcf6fa01472f35792684ea35d0657c/84459315276.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2a3bcf302---zatikofadofigegew.pdfIn PDF document text
    • http://gialtour.it/themes/userfiles//files/15472271249.pdfIn PDF document text
    • https://broadcasthub.com/ci/userfiles/files/vudufalataraxawonu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=palindrome+names+for+twinsPDF 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_off0000d14b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD14B 16832 bytes
SHA-256: e845a33c82cb4c544a36ad77ceca96beae34724f18dafc94e2811041a045edc3
font_01_sfnt_off0000fccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCF 10604 bytes
SHA-256: c2723e41fed21c5c5dfccf40070d2f13d030cd81f4d87df6561d3a9c852ac4dc
font_02_sfnt_off0001150c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1150C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.