Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9503f91bce29604…

MALICIOUS

PDF

86.3 KB Created: 2021-07-08 02:32:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: b0f1d1a87793b423e02380653068f215 SHA-1: 80923a4e86213cd371208fdd320a56663151be3b SHA-256: e9503f91bce2960459ba1b643c6822db1b602cd88325a966728c5afd248ab7d6
156 Risk Score

Malware Insights

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

The PDF file contains a link farm that directs users to multiple websites, many of which are hosted on compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggest an attempt to manipulate search engine results or lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/cm4bpdt6subtm28vlnr65ddtb7/ranadojelonoxuvitog.pdf In PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16073b7674d4ec---16340014226.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086115ab4982---45795321261.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/61dc4b0ce1ee4898d73dadc83b0c450a/sesekedodipegokuwuwe.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/giwenetoxexakabejumale.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/ff63992a797df0b439a909cb665b8d4d/dibijotowexazezo.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872626c9d31---fisixizopadewakap.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/favotumi.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb9d6b7566---12035884055.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16082d9bdecb90---58854093745.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/rukowasoxiwuz.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/bojuxagutomabopatilokuzo.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/4545d654f2e6ad03c1f5afc6bbdca017/83248058647.pdfIn PDF document text
    • http://beadsandsupplies.com/images/file/nonepizufikegosewudexebi.pdfIn PDF document text
    • https://hurtowniaroza.pl/upload/files/49789041526.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/2b763d765e82730faaec5fff43a59a42/dizatugejavozumob.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160708733ee7a8---44783321694.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/1c9c6fc76bbf7c23211a2b6c41c2f607/jelokuni.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607efbc9043ab---88846009369.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/45865403832.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/9a1a86144ce8eb714bef5dd53b7bc9f0/61438877578.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/kilomefe.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0b73ad7baa---23998643898.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=how+do+i+find+the+area+of+a+semicirclePDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB63 10820 bytes
SHA-256: 65a88bb5ac1bebbfef73c9893e9e9f9ea56f040e83d474a1c43a3275656028c9
font_01_sfnt_off00010422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10422 17988 bytes
SHA-256: 769f333c122de9de6374f15cf994cf903d28242f95e557974a58ff376971bd81
font_02_sfnt_off00013385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13385 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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