Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad08bcb3f01aa1e…

MALICIOUS

PDF

115.4 KB Created: 2021-08-20 20:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b8a32bc3908b3be35379e4e96bfdd4c9 SHA-1: 7ddac34d5eeff9110025abf78bbfccbedbb5416c SHA-256: 9ad08bcb3f01aa1e4ba77247e9eec359b6bd82c3b9c2f5a683ec5142b6128fc9
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. It contains numerous URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and the presence of external links are consistent with techniques used to deliver secondary payloads or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://smidgel.ru/uplcv?utm_term=vector+integral+calculus+problems+and+solutions+pdf PDF link annotation
    • https://nomortiga.com/contents//files/pugugobova.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/8696089138.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/biziduxozokopitagasipilen.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/91301925799.pdfIn PDF document text
    • http://yachtandgulet.com/userfiles/file/1449720882.pdfIn PDF document text
    • http://brukbet.com/user_images/file/79472989973.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/9b4a6467c407fd6b75e8d6bf2188a5d6/jemeveliduxopimekomige.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/38184273518.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4bd93a936---tekirojizuzabe.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160855dbfe67a2---kodadilatatafuzebof.pdfIn PDF document text
    • http://hvpeds.com/upload/contents/file/20109421124.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/bd8d77785f352a5012e97952eb525fde/vapojawozemabakuxijivow.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160baf4fa49fa3---24252525568.pdfIn PDF document text
    • https://marblobathware.ph/app/webroot/img/files/zazibadakijixa.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af2defb0954---bemunudinosixipusi.pdfIn PDF document text
    • http://sheeld.org/clients/d/d0/d021426cee8527c21a172be12ef3d645/File/tabexawegowixuraxe.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/1b40bf67e93c3c8db2c635f02d906ad2/limexonexupabo.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/gesomelep.pdfIn PDF document text
    • https://anandamsanyal.com/userfiles/file/gedomumavaw.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/1169822d1f9fd3d595556f5639cb4d98/solajisazukenedegitadarij.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/puvajo.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b193063356---50546663786.pdfIn PDF document text
    • http://cuuhoatudong.com/upload/files/kudika.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/8e2d6492d3a1056e0458e86e9624d7a6/29803675138.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/rcp5p6l9d219bpeslu4c74iqhj/sefakamanupeside.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/66186638208.pdfIn PDF document text
    • 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_off00015e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E0D 17920 bytes
SHA-256: c193cd9704ce9cec1d626ed35f0e1c231a0a2ae7b2125da4eb13e5c602e2f2ad
font_01_sfnt_off00018cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001a50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A50A 11172 bytes
SHA-256: 195e7d2c9de58d4ebe70e4f10571558f43f847432a9e59c67272fb415c8646a7

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