Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca68ff4aa1a3a7a1…

MALICIOUS

PDF

73.7 KB Created: 2021-08-01 21:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ff9f3822aaa266ba4c96146433049fd4 SHA-1: 3ddf79ca695abf190938d37db21b83edeaae0e23 SHA-256: ca68ff4aa1a3a7a15af8a3b5d8d7ee821acfb6bd52aece1268c6ac646c96b748
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a link farm with numerous URLs pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://philabc.ru/uplcv?utm_term=t%C3%BCrk%C3%A7e+q+klavye+indir+android PDF link annotation
    • http://thepokewave.com/uploads/files/lugazenik.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c40a8bbb4---37718878047.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/dgr8tmse4aekjiudc25h4omuo4/25786206586.pdfIn PDF document text
    • http://ypperfect.com/ckfinder/userfiles/files/31060644750.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16093a13153cc2---wojadesipolejogas.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/3c4c242e8bf1132da429b3a245633828/fetisasekisamuz.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/retokisugulagukojij.pdfIn PDF document text
    • https://aannemingsbedrijfbarthulsbosch.nl/userfiles/file/mitagivixufowazetimurawe.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/77f366f4fbcdc2654542a8b3a19d8281/35402990554.pdfIn PDF document text
    • http://ecohouse-lab.com/userfiles/file/99765695551.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce7b4736a34---14325059336.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/wuwadenikalesejoz.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/52517732399.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c745fdc067a---77459070089.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/nizufobepawof.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/170a15fe85c49971083f3c6e7b8e696e/70310841475.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/410115db913188dbeb7e2f262230b3d4/lisepopido.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/qp9m3g3nco4d36mgj0j6sct0f4/93261862894.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/xidaz.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c868345ac9---zuporusipukanesejoludejon.pdfIn PDF document text
    • https://cissud.it/uploads/ck_editor/files/18492897798.pdfIn PDF document text
    • https://skinrepublic.vn/webroot/img/files/jirixe.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160775e67f2906---fepidefoxunosevok.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f35832c6cb5---47793536483.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210712212455.pdfIn PDF document text
    • http://richiefamilyreunion.com/clients/7/7d/7d03816b951c94fc7c065ced7c7ccdcd/File/vifesiguvunadexeduted.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_off0000bcf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCF2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d509.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD509 10744 bytes
SHA-256: f85369dda427b9c87cea11cb94f192be95267f0c7a692a3f39bdb44104bd0948
font_02_sfnt_off0000ed8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8F 17092 bytes
SHA-256: 79adb1a1e23d804608954f622e9fad62b7f31cbbf0eb16fff0a61f421fcff521