Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eb2c2ccee33f595…

MALICIOUS

PDF

89.6 KB Created: 2021-07-28 00:31:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b2af5ddda1426a238fb4497f5abbe2c1 SHA-1: 44cd6ee7aaf3aa2566cc4b3fad3d67767db11978 SHA-256: 4eb2c2ccee33f5959ca9bae40725b4f8129b4264a3c2d7dfb2abeb2bce21d5b5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting it's used to redirect users to malicious content. The primary attack pattern involves leveraging these links to deliver a secondary payload or conduct phishing. The presence of embedded JavaScript indicates potential for further exploitation beyond simple redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aed5ba37a88---povavefulowuzerado.pdf In PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0c1080a44---12806470114.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebd0eaf047---veruxazibanowasepikatetex.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a18d86eea91---87171252976.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/lusupesifuninep.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/107ed4e40cad5207ae13060dba44edfc/48838792468.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///46930152384.pdfIn PDF document text
    • http://csc-0411.com/userfiles/file/20210720014343_lt32zr.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/o0fd6riaa4ua9ftgh39fcdnpd0/notafolotorun.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/55286507203.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/959542cfbfeb8084914c10763df83cc9/jeruxupilejafaxuxus.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021052704522070554.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/piboguxuviganugadazeda.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb124deab2---26226287253.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/38392840594.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/6a13af05a85b81f260af8b7d162ce74a/20344068269.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/28106164858.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/luperazigifof.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/2260lelv9jr2eclk2r0g1a178t/97096890478.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c69bf26431f---welupirumapuzomuzovojise.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/24241002455.pdfIn PDF document text
    • https://csn-alliance.com/data/files/fokinadifodaxoxizux.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c5bf37ea8---90098652049.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=pandillas+guerra+y+paz+segunda+temporada+capitulo+1+completoPDF 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_off0000e9a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A0 19204 bytes
SHA-256: 66ca88bfeddf5561e34eb403bf822c7b2b2658f14c6100c501d73fb0fbbb30fd
font_01_sfnt_off00011a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13291 11184 bytes
SHA-256: a814180e85abb88fe0fd3634357fef800d7c37a882b76fe4ad05b85cf3755a19
font_03_sfnt_off00014c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C93 2064 bytes
SHA-256: 5221cc56e96b657ff7c15f49bf1fbf1b5222e15cd7ffd769ce953162a3e53832

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