Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e0096772c525387…

MALICIOUS

PDF

86.2 KB Created: 2021-06-27 22:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ba59c00cd708d04a0eb06692a40eac8e SHA-1: 952508b2373f7c6072cae798f88cec11631b69f4 SHA-256: 1e0096772c525387246a51acf204ef1c4307854cf88c2866cea9f598db7a35a6
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links pointing to compromised WordPress sites, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to exploit users through social engineering or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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 https://archism.ru/uplcv?utm_term=the+solution+focused+approach
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160967f1ddf76e---lubajuzuwi.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609430e88a994---30183501161.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc316d4ac2---22127467403.pdf
    • https://dascalita.ro/app/webroot/files/userfiles/files/tidogubova.pdf
    • http://bluefield1966.com/clients/26642/File/67229166735.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16082c6b40ad98---nivukizajepivof.pdf
    • http://analogsys.com/uploaded/file/1984414341608a4ceccf86d.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c0fd975fed4---besegon.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/d5edd425a594a46552b4e6d5a6a7b2d1/bofuwivevizima.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608be97f889e6---fenisibeziludinugamokarol.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/pkfhj6pih30j3u1gv4id3vmbhl/fixadupavepexowalasejumol.pdf
    • https://hoalavender.net/upload/files/30092854845.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160baffc26e4d2---netapenawodeso.pdf
    • http://gursakaryahukuk.com/images/file/59009443718.pdf
    • https://jamurgoreng.net/contents//files/baxinutupapofopixamovaw.pdf
    • https://vinamex.info/uploads/news_file/mivugarunevajegikapesupo.pdf
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/146e8700e21bf37df628682a6d0035f6/terexalitiwotolegonab.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160797941c07a7---5992295838.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609d36a297861---fonex.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607a47c4c7209---posesotanokafatuzuv.pdf
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/ikck6qb7bgt0comabbudubjnrv/suwavisapi.pdf
    • http://hongshengfish.com/uploadfiles/20210624/210624215548767025l0bp6dyo5ym0.pdf
    • http://capitolmetrophysicaltherapy.com/userfiles/file/dumonorizinixabolukibi.pdf
    • http://snap-drone.com/userfiles/file/viwoxelupekuzuriripega.pdf
    • http://studioguatta.it/userfiles/files/gajowotinadap.pdf
    • http://nwatchonline.net/userfiles/file/25996080781.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed07.bin
982d7dd65f461e445673c885acb1cb7b79744614ce3fe8aa208680815f4651d4
pdf-font-stream PDF embedded font (sfnt) at offset 0xED07 17464 bytes
font_01_sfnt_off00011a9f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9F 16792 bytes
font_02_sfnt_off000132b6.bin
1eff9dfaea9346edeea759ac13d262f65085e2ff1a8260a8edd37fef92631b92
pdf-font-stream PDF embedded font (sfnt) at offset 0x132B6 10780 bytes