Malicious PDF — malware analysis report

Static analysis result for SHA-256 1179b584c85ba9b7…

MALICIOUS

PDF

85.4 KB Created: 2021-09-04 11:22:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b4eab403ae3ce98df117c8732195dd18 SHA-1: 759fe6e64d614c85eee72dfa26500529dac50c1f SHA-256: 1179b584c85ba9b79bf8eb5a39837e1a1780288a2d74418f6d461d1d75dbcc68
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan distribution attempt. The document contains a link farm pointing to compromised WordPress sites, likely serving as a distribution point for further malicious content. The presence of embedded URLs and the nature of the heuristics suggest an attempt to trick users into downloading additional malicious files, potentially via JavaScript execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • 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.
  • 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://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607eac3e452fe---87710088156.pdf In PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16081c56fd5925---21816240384.pdfIn PDF document text
    • https://ihappywash.com/uploads/files/202108240815562363.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f27e8d498---3421408109.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/162e7aabb6f3368177092a79ea948574/jozovitawurudibamigunemaj.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/8e971131ca84c0365aa27df2e874cb73/pagakozopapejo.pdfIn PDF document text
    • http://dahchen.tw/userfiles/file/48107448564.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/jogabasofutuji.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/78928953835.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/botujidejerupulokamenexan.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/77d21bfdf1aced594dce6b48dacfa5fd/nizevanifani.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/43369163377.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/lilomuzaxoratukesov.pdfIn PDF document text
    • http://krzeptowski.pl/file/kapoxibivi.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/lokeriwaxotowakeso.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/69713246666.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1611d22c2c3a22---wevezipovemuw.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2ca9de880---vetivikedexekexobolup.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/346f06d45167670f15b53c2ae1243455/gerofulawexuwif.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/0d6ef8a50d3f85fefcc0ef71fdbb223a/63497469596.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160848f777c825---59842766112.pdfIn PDF document text
    • https://horgaszvelem.hu/ckfinder/userfiles/files/kiduwilupakugel.pdfIn PDF document text
    • http://www.videobezopasnost.ru/ckfinder/userfiles/files/12666431792.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f7d595512---85122695884.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gapuvanifurel.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/zivodatifozud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=tutorial+de+photoshop+cs4+en+espa%C3%B1ol+pdfPDF 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_off0000e3ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC0 18860 bytes
SHA-256: b1fb8fa86ec0fbcb524d2965a6a16c4ebd307646dc605ef9319010cf9d60850c
font_02_sfnt_off00012c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C17 11064 bytes
SHA-256: 72a972663f2bb5d6c62e728104e428d43bb2e578fbe6575a7d9a5a8283e74e45

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