Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb2e8c074d525af…

MALICIOUS

PDF

86.4 KB Created: 2021-06-29 06:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2e82c3d409aa84db25beacd1129a0be5 SHA-1: 252a4c13c0b3e637a36ec66e6132051af3d96109 SHA-256: 0eb2e8c074d525afc7f9517507364f302955d96e8ea61b1d488941254191dcc4
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is unreadable, but the heuristic firings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://casaatlantida.com/userfiles/file///20325104939.pdf
    • http://okmarin.ru/userfiles/file/93385903947.pdf
    • https://ayurvedaemart.com/uploads/file/wulinase.pdf
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/xorujimusipazaroru.pdf
    • http://sochistandart.com/ckfinder/userfiles/files/95705116700.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/kr695hefaheptb62f0kuu9nsip/dukovevutod.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/d98327f95ee3e0dba70f50376a6fc99f/jenifumejowerukosodiz.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/n6t0kt5fce5fl4fj3fb00uvh8i/lisoxebabafovux.pdf
    • https://xn--bren-mgenwil-gcbf.ch/sites/default/files/fck-uploads/file/divojonomewobunizese.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085403eb80de---fopepexosuvisiritumivir.pdf
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081b98b50f07---75503968675.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/16098f2d67df49---nuguwipexaseregakatawaz.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/68c20f7c60e4deee1a9e3da36d7aaf38/gupefosuzunugejeja.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160791283f41b7---32730867300.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bada5abf39f---kupuzodejes.pdf
    • http://dok-vo.ru/userfiles/file/xibawuvawizazijokebaz.pdf
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/068e2a51d4a791cafd96f089638c5383/60331679835.pdf
    • http://quaker1960.com/clients/3/34/346d0055920ff30d27c63167e405b0e7/File/90391008999.pdf
    • http://progfin.pl/userfiles/file/16744730810.pdf
    • http://alarcon-v.com/editor_upload_image/file/14916800006.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/a0tkluttgfn8pp142vqetltpvj/xilufifewedovuromo.pdf
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/d5a2a7d2e21dd0580faab85c12675bee/wulumogijomaxedumasuji.pdf
    • http://antifftech.com/uploadfile/file///2021061819361617.pdf
    • http://goref.ru/files/file/98813560209.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087539560e89---36129095405.pdf
    • http://titusrelay.com/clients/e/ef/ef304ccc03541e9e6382bef5f13b0a7d/File/16764748519.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=dr+small+ophthalmologist
    • 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_off0000f166.bin
70dff8772b6f11d30ea49de0396ba06635679cbe10f87c4957bc02647ccab2ee
pdf-font-stream PDF embedded font (sfnt) at offset 0xF166 10464 bytes
font_01_sfnt_off0001091d.bin
733c7f59b667730d558bde991280d0ad392c54deea3a8e27c77a618c763c4a84
pdf-font-stream PDF embedded font (sfnt) at offset 0x1091D 16656 bytes
font_02_sfnt_off0001346f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1346F 16792 bytes