Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1eb2c80132e2fcc…

MALICIOUS

PDF

77.5 KB Created: 2021-09-02 14:09:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 698ff00a1e5a6fcebdd419baf6c6b1df SHA-1: 7dd0059b81b70f67f23068a449b27fef264cede7 SHA-256: e1eb2c80132e2fcc389d420b8078535f1d98e3574638317c4b2ea4399266c808
172 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites. The PDF's structure suggests it's designed to exploit vulnerabilities or trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6421

Heuristics 8

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810d148f722---71889197194.pdf In PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d07d61d14---gixisalasawubiw.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/5375341695.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/8353b9672e7fa88b9bfbc39930dc93b5/50000594612.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/a88f2c98a3bf7e1c6c4ee47da9985122/kozibifuluxokexovoke.pdfIn PDF document text
    • http://italiancousins.net/clients/5/54/54f3d33123424807706abe9154268524/File/52885424006.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/9ebbdf22c5d446a0c786526e2024a9a5/7571268052.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/8a6c252007ea483b308286f6c43e9785/86161334194.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca143a385f---dedelaxunefuf.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16088abc207ccf---98687117100.pdfIn PDF document text
    • https://cutandcolorparrucchieri.it/file/68218042759.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/3294315c249f4bec102035eba3b58500/76954020167.pdfIn PDF document text
    • https://tepihtrava.rs//files/jafetufutibegutob.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/nomirodekamimef.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/85431011033.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/06qsl1khm583qsgvbshq8utmt8/50521289071.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/xonuxokizapewan.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/mofonewoxilaka.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c623a11950---purekogoruz.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9f6215308---lodivefogujufatepu.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/25358408460.pdfIn PDF document text
    • http://amandatour.ru/js/ckfinder/userfiles/files/50058219926.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/1779233854.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/1qq1vcg1m86fk0l9sfjjkhka39/wifajutelalixijokul.pdfIn PDF document text
    • https://vydavatelstvoklett.sk/userfiles/file/81676596199.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5c708098ab714e615aeb4e43a77c68e7/veboxitokafijejasumet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=gujarat+road+accident+victim+compensation+scheme+form+pdfPDF link annotation
    • 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_off0000d138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD138 17340 bytes
SHA-256: a247dd6b9498dfd1a0d283cd76d889262e1efb7abef10e168ce28d2559bc5db7
font_01_sfnt_off0000fdab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C2 11176 bytes
SHA-256: 1bf8b953376ad0f426728ddaa933ffe744fca193186423dd26c2544483fcf713