Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb587e8757588a11…

MALICIOUS

PDF

92.6 KB Created: 2021-06-29 23:05:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 09ccf0df9787ec67693a564a4d9f7719 SHA-1: cd36953b384b2bebc6936b25a5a724f48c14909a SHA-256: cb587e8757588a11b97b005da07e0c94cee9ad684207f809c968be866dc75a56
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lure users to malicious or untrustworthy content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://angelescare.com/userfiles/file/29762336271.pdf
    • http://vimbark.sk/editor_uploads/files/65433050846.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/bb60b0faa5324ebddb8877080c852f30/rivubunubasobilamimomenu.pdf
    • http://itssilvertime.com/clients/2/24/24efe347a73a8ce028152bf895bc11a7/File/sisulitepevemamamo.pdf
    • http://bajcsidavidfoto.com/_user/file/99115152998.pdf
    • http://bizbecho.com/pa/trainstation/uploads/image/file/ruxudeguzivovibasukudig.pdf
    • http://vankouwenenmastop.nl/UserFiles/file/zenipogegalurimewajavezo.pdf
    • http://alexhofford.com/temp/files/file/doruxojevusixesiwabaku.pdf
    • http://ekotop.eu/userfiles/file/27506536717.pdf
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948fe00bf96---82212895262.pdf
    • http://jvcc.cn/ckfinder/userfiles/files/2106041919042674273cgoe.pdf
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/snj5669gqndqg2jq6lv9amc4hk/80505017663.pdf
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608193e35dbaa---kitawumukebotidudonaruwip.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff8eca988e---vubux.pdf
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608375cc5e9d1---linofeg.pdf
    • http://ozhelalikram.de/resimler/files/40560709600.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4cbe47362---zuvebuwikodobewu.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160777571e0090---34762272974.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085fc2d37aaa---67704780098.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/s5r897simfnlj0sneqfhelntu1/poxegabosopawaweval.pdf
    • https://akapacha.com/userfiles/file/zuximijigeladozoburuki.pdf
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/mtn4k7e6ro8q19nd4dhl1th5oj/betelojusikunana.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=god+consciousness+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_off000107cd.bin
35c76bde62e57c54052b20e4ac4c03519e2d6d2c75647a34ab235fb7332ba843
pdf-font-stream PDF embedded font (sfnt) at offset 0x107CD 10608 bytes
font_01_sfnt_off00011fd6.bin
652efe931c5708a74173be5d108e24f5b5bc047109d501a84296f9063a7326cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD6 17556 bytes
font_02_sfnt_off00014d47.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14D47 16792 bytes