Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffd277a577285d5e…

MALICIOUS

PDF

95.3 KB Created: 2021-08-18 18:28:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 3b1aa74f277af494bf9112fcd203abbe SHA-1: c7c7f812142c400cc236b3d89f16fe8b5f322171 SHA-256: ffd277a577285d5e43cc536818aec4e77642803bf1dcc0af0a76592c11a53a86
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, and it contains embedded JavaScript. It also features a link farm pointing to compromised WordPress upload storage, suggesting an attempt to host malicious content. The embedded JavaScript likely facilitates the redirection to these compromised sites, which are then used to deliver further malicious payloads or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86891f2455---rogitomikagefibevojuk.pdf In PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/e13e2ec0fe62503cd5deec1dc6c3d0b9/vozezopirijiziruk.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609ece68ed77b---17386000724.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/5e198e07368b2b7c80283c830eb935ee/zupunetexus.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607074d47615e---nikuvixesodudolamig.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/1625255215fatenexu.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/76900071504.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7088b681e---nizamoluledutesu.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/dekexik.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1607201e9b6693---21144750940.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cb53584c0---jolenefisonakivobokoz.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/7677644072.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/aac679181a581cc94c48013f809488a0/58382480494.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b09c7b1bc---50334753945.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/maradogupogelasosukode.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836eca7f319---36350536998.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/f9318f7fe2959a34400ee99e244fa192/99473710018.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d177fca849---dosivub.pdfIn PDF document text
    • http://uktohabbarijamalta.com/files/file/vawedisiretojado.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6d3daa72a7---57158154775.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a9f570dc3---32808281061.pdfIn PDF document text
    • https://cargoservice.pl/cargoservice/userfiles/file/vagesoxo.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/13994347892.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=ver+the+carrie+diaries+online+espa%C3%B1olPDF 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_off00010730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10730 10784 bytes
SHA-256: 7e461f34533a4651398aa2c8053d1c91e9466de1a8a1f33580ed2d4e0e9f1751
font_01_sfnt_off00011fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB1 20468 bytes
SHA-256: f97dba978eb9d3b543938c5ed84f2077192b1f3377fe17ed061392c78ff2ee25
font_02_sfnt_off000153db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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