Malicious PDF — malware analysis report

Static analysis result for SHA-256 acd21d189685d334…

MALICIOUS

PDF

72.9 KB Created: 2021-06-26 22:56:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bef5d259502df70a3a819a292343030c SHA-1: 3bb4f01c5861f06aab392a7c0a306a55a4599d4f SHA-256: acd21d189685d33432defdc12bc089107bb9ae4067849fe0b7d1e7f9b9379486
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF structure itself is also noted as a link farm, further supporting the phishing lure attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/cql80rg14keg761ebfi1lj19tcfboaem/xezojiwokewagedewuj.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160736fc097325---990856358.pdf
    • http://temple.mo/userfiles/file/jutusi.pdf
    • https://szabobuszrendeles.hu/files/files/sikegijuloful.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16088948c69e11---87781781763.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/gdrpagpfpqjq6gidpmf7j6rktm/25486606883.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/tlgu7o4sajveebqf5077dfe1p5/27809089050.pdf
    • http://www.rify.us/cms-uploads/files/45942758280.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd662566e3---lojukediwa.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b710ddaa6---99877883613.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d95d515cd4---88697242006.pdf
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/lexugobozexujovapewukox.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c489e6d2151---bolobikibefibizumukaf.pdf
    • http://odmooregolf.com/clients/e/e7/e7046aca88cfcc92de0be8f3f6b3de3d/File/kojilulujekivokopef.pdf
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b11d8a7f90f---rabopetigatowujazo.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/55q05gc27o7j4tp17l1o0mdpbj/17908628238.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/21949bc6eb2298a65a4290aa46716e26/wufekar.pdf
    • http://tafgambiatours.com/userfiles/file/jotaferofurixaw.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/40427bc8cf05936b4b20dcd8766adec0/42944481206.pdf
    • http://officinedesign.it/userfiles/files/31879462013.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/c13444383527bfa83da49a701e65a1f4/befuvakulofo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=early+on+meaning
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be5a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE5A 16792 bytes
font_01_sfnt_off0000d66c.bin
b89253872c3f40a65fddb250bc166afd265f12162e160474cbbe7532d3998623
pdf-font-stream PDF embedded font (sfnt) at offset 0xD66C 16272 bytes
font_02_sfnt_off0000ffc6.bin
b23201582ba11a8f9ca2851da026851492a8445434403d9bff6c6309b2b71c81
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC6 10280 bytes