Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd0e68a7e64fbb91…

MALICIOUS

PDF

84.3 KB Created: 2021-08-25 22:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e7efe474c2e083e50c3c283e00383e63 SHA-1: 325e9908479541a5b4e2922e78ee4cae633389cb SHA-256: cd0e68a7e64fbb91590fafdbc39856c46281eb2d6dfb2b70825079dffca232d2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads and disposable hosting domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The file's structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/n64nkova850368ldh1itnmm43g/71551333353.pdf In PDF document text
    • https://alutat.com/data/file/94590464318.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ab75ba03bb3---mivawomujojuginedi.pdfIn PDF document text
    • http://thesecurityguardunion.ca/userfiles/files/6554607455.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/b7fq7elcrg3cu9kev853k0a39t/felun.pdfIn PDF document text
    • http://mannadey.in/FCKeditor/file/49226639393.pdfIn PDF document text
    • http://elma1.ru/!upload/files/22106126673.pdfIn PDF document text
    • https://sinaia-vik.com/admin/fckeditor/editor/filemanager/connectors/php/file/wowuserowikubeka.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609cab68570d9---sazalidifegujojemepa.pdfIn PDF document text
    • http://mrukseo.pl/userfiles/file/guvixowona.pdfIn PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/naguvivuzevavufasetaxoba.pdfIn PDF document text
    • http://nessium.net/userfiles/file/66306485172.pdfIn PDF document text
    • http://thanhtindesign.vn/uploads/image/files/karemu.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab2410e538---2353139918.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/32974425729.pdfIn PDF document text
    • http://dxczx.com/ckfinder/userfiles/files/20210801_200021.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7b6da29a2---49758880487.pdfIn PDF document text
    • https://frontlinetherapist.com/wp-content/plugins/super-forms/uploads/php/files/af63a910fe6ce9faf17bab2c26145b14/19639460299.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/kolifasasukaborup.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/89038464877.pdfIn PDF document text
    • http://nocleginaplus.pl/uploads/userfiles/files/90475909537.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/65924227480.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=the+beck+hopelessness+scale+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_off0000e484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE484 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9B 10624 bytes
SHA-256: 7e319bd6acfaf6e72cbf57cb7e7032399408e0eabb203d2bdc5e7461844829b7
font_02_sfnt_off0001149f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1149F 17456 bytes
SHA-256: dd02a0c5cb61d329b0b3b7d4d7dfae155f390c0d77535ae1a1b420517e9e864a

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