Malicious PDF — malware analysis report

Static analysis result for SHA-256 da93e228f72cab62…

MALICIOUS

PDF

74.3 KB Created: 2021-09-01 08:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e5cc39cdfe5882d895df88b931c0705f SHA-1: 4b027e654d7ab15326ed558473c50b552261790b SHA-256: da93e228f72cab62b1153d13a599a372b0deaf2f9cf74950492529ad4d6aaa51
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised WordPress upload directories, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to further malicious content or downloads. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cccd751361b---41552321975.pdf In PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/9c7666f7ab8335c2beaaccb694c6ede1/18782301261.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1628949066.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/3mnjfc0ilvuq1bhs8usa6hu1jn/81485741764.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/eirav6vjgjiv3a8ut1aeaom1nc/mikemebak.pdfIn PDF document text
    • http://tate79.com/clients/868750/File/rijidenegopafexurodunikop.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/68873492397.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/a222951c29d37af5c62959b993e91793/zodaseror.pdfIn PDF document text
    • http://arndt-fahrschule.de/userfiles/file/rusutupakezasu.pdfIn PDF document text
    • http://medi-sen.com/files/files/60343522660.pdfIn PDF document text
    • http://mrcookie.tw/upload/editor/file/110017078103.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a10cb6ccc8d---dogusewof.pdfIn PDF document text
    • http://angelofthewinds.net/ckfinder/userfiles/files/46680689742.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/79b51f5ac1cc519b0c51f9d2c48f9fda/ruwejefubamupa.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/800cc7e5f4c31cb8dbbfe0dc4faaa8cf/6453904472.pdfIn PDF document text
    • http://inwama4.vn/webroot/img/files/zebunavevuvivogunevoki.pdfIn PDF document text
    • https://halkum.rs/files/zopoga.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/15440480106.pdfIn PDF document text
    • http://ned.ru/uploads/files/951420531.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/94247543475.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16112ef27c99ee---43604052702.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=leading+coefficient+meaningPDF 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_off0000be62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD674 17612 bytes
SHA-256: 182d47044277de2b20ae473459ed45281dc7d1cf069c45d7c605b8e6086db75a
font_02_sfnt_off000103f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F9 10464 bytes
SHA-256: 281fd674350d693d3d4451e05c8eee8a8c83ed1792141a4776e74b56815a53c8

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