Malicious PDF — malware analysis report

Static analysis result for SHA-256 db58de2eb4c55fca…

MALICIOUS

PDF

89.0 KB Created: 2021-07-29 20:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f739e8887c6d5b7d05a868e588442e69 SHA-1: c2edb4f7e05d3bf9f22652c55115fc2e1d2ce0e9 SHA-256: db58de2eb4c55fca32a572bfe1e816d29256ffde5f86f1e9335fc5ccd1d7b035
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress installations. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the structure and URL patterns suggest an attempt to lure users to external sites, potentially for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/4c256a574f5a47725d1c70d06fe413fa/daresosatilafusure.pdf In PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/0b2edbe1f40b024cb93a334cabce08c3/2583580989.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084bca84a757---dizijurofitivuwofa.pdfIn PDF document text
    • http://digitalqwerty.com/ckfinder/userfiles/files/jolugeridi.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/31825466749.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/ff6fad0544fefc96469af917f2a9669a/76449354724.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/7e18e496bc0039a6415b144d417f8f27/buzem.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/lasonuxodudiwogumeniw.pdfIn PDF document text
    • https://lexconsulting.ro/webroot/files/media/12765590944.pdfIn PDF document text
    • http://d4sontario.org/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/99326866465.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160f886c0e0b46---zuremuzo.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/c6be27b25e6a7f67d1dd67c6c373217c/73326001866.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/57534843861.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be0481a4c0---61252798376.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/23512158701.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e50139f2e0---wuvufejesatuxadotefojo.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/0e9692cd91b3fe18aa0e54a77a5ae057/vibunuxajapivepizadijukat.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/9a6b6bf3afc494295031e15fa950dda7/zorakabeg.pdfIn PDF document text
    • http://leasingtowers.com/ckfinder/userfiles/files/21983923676.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608616880c858---99058907889.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/16075a28006d13---28625118715.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/fokogamag.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16097d6a8bc21d---kebikode.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=legend+of+zelda+breath+of+the+wild+official+game+guidePDF 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_off0000f4cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE1 18064 bytes
SHA-256: 4580c7693b2f28dac57f4ece9cae02187dbab5fb5dc2891fc328ebc70b4b150a
font_02_sfnt_off00013afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AFD 11096 bytes
SHA-256: ec4c8152a4da2d99353a5cf5d3c1bfe59a2f4fe943d773502d39f7c81983f27e

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