Malicious PDF — malware analysis report

Static analysis result for SHA-256 f08ea86324b4877e…

MALICIOUS

PDF

83.7 KB Created: 2021-07-17 16:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 322930995882df32631c632a59926990 SHA-1: e8aeacb7a9ecb7c9173999a456996f254101473c SHA-256: f08ea86324b4877eab5189196a8018c3881e623afa87bd7276704c99735e2a32
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress upload directories. These links form a link farm, likely intended to manipulate search engine results or direct users to malicious content. The ML classifier strongly indicated maliciousness, supporting the assessment of a phishing or SEO poisoning attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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 http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984ab98a725---97383953479.pdf In PDF document text
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/3985130333.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/95931736902.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608832c6eaed7---bevawirevun.pdfIn PDF document text
    • http://jorkurojus.com/userfiles/file/39683494016.pdfIn PDF document text
    • http://tulga.ru/editor/files/6348748749.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/h21fat0i3f3cmul603dhdbiu4n/tugejasixejifidoberetaj.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/39664699780.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/2836165352.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609681781c858---31697732486.pdfIn PDF document text
    • https://daismene.it/file/13817335838.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072019f4183b---wexeninelejeradebulugowi.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16084a9b57bd36---lajipudet.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/25752131067.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/wiraxowazobirenujutego.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16080a64386f82---jaramogevinujuvijomilag.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/55301993382.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16091bcbbba1ca---kalikoruxedunodumawenazik.pdfIn PDF document text
    • https://mobilieroccasion.fr/uploads/file/65942282961.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/58256427429.pdfIn PDF document text
    • http://ncabhsa.com/clients/875427/File/pakunoluvokosisuzugu.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/8u8ci04mipq0oomstuo6ng5m4g/91523880000.pdfIn PDF document text
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/33416229607.pdfIn PDF document text
    • https://soechi.com/userfiles/file/gebiwoxosatisilud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=lyrics+there%27s+a+stranger+in+my+housePDF 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_off0000e3cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CC 17056 bytes
SHA-256: a52715094cce45836cd12b6daef72b84f2ed4a3e0cfd92a8a249285e840bf8f2
font_01_sfnt_off00011086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11086 10836 bytes
SHA-256: a74f60ebc4a8e115007542d72e95f8300a0414d16f2d5ca01ff3c8d1de651580
font_02_sfnt_off0001297e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1297E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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