Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d1cede6afa78569…

MALICIOUS

PDF

82.9 KB Created: 2021-08-02 23:48:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 08bf49c3af4daecae9bd8a6aa0cfcb19 SHA-1: 930d41b7cc739cbf088be8a4d29f21c0b8c6f40f SHA-256: 2d1cede6afa785691103a8ca48bcda6882e9be9ba85ca5c9d67c09aec5a33c99
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b6ea218bd---60638837613.pdf In PDF document text
    • https://betenrealestate.com/sites/default/files/file/kizafokedufijelerisalanid.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace1cf9cba8---18360497150.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/tixizagofilizej.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/1786345e4e516782d6bd6a55a037ae27/60501275301.pdfIn PDF document text
    • http://whewfamily.com/clients/12004/File/11864493773.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b3cce488879---nasagovafo.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/perurirorekekamuxo.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/92424404444.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/45347051923.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3b1e74fd3---58451124929.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/vojojodew.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/37362f4908c3fc8049c5b2716ad2776b/37160526718.pdfIn PDF document text
    • http://kolkandkolkdesign.com/site/data/ws/files/pawomupetimafapenomu.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/768172761386978c1aab963f0754c434/48549832839.pdfIn PDF document text
    • http://gdgom.com/upload/file/210629035416712974rhpcpbyle6xk.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///86156140978.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/84254453306.pdfIn PDF document text
    • http://ledins.lv/cms/file/bobuposuzilapudanonekus.pdfIn PDF document text
    • https://gotamsui.com/ck_imgs/files/sonamam.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/1c1cbb431570f311f5770fe96e0381bb/11688428333.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=sat+blue+book+2020+pdfPDF 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_off0000e04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04F 17820 bytes
SHA-256: 2e920e38b78b59020fa3733ed349c66d65014dd3c0bf77bab116743ef3326487
font_01_sfnt_off00010db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C7 10676 bytes
SHA-256: a6fc6b009f27fb519c509804702738f3964c81b0bb82542eb3e796740c83b7aa