Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5022490ba9ca071…

MALICIOUS

PDF

83.8 KB Created: 2021-07-24 12:08:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2483ba1b62fe00df53ad672237e8d4bc SHA-1: 1e184fe75aa05fe3d0a3f6f92ee9b8e664a228a9 SHA-256: f5022490ba9ca071c4fa1027db7b0be6e9ae0519d605481b9e1e2cf41ba66896
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV both flagged this PDF as malicious, with ClamAV identifying it as a phishing trojan. The document functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains, likely intended to lure users into downloading further malicious content or submitting sensitive information. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://keigan-productions.com/clients/863431/File/kijura.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/19cf281a0c1b2afeb7563dec06d09c0f/darosapubevulavoxalo.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/e7db0d804da8f839d5a679b5792253b3/wutefozenanixuvobikemubo.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/ff9e24e0edb1d6e01e9acd072182dd75/sizizudokejorozabofexi.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16080cac976054---67858952731.pdf
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3dd414449---dazirow.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a61715b0d22---dexojevelijuxawuwenaf.pdf
    • http://chono.mn/uploads/userfiles/files/67177158547.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607330355b552---mubelukiz.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cacf3ea188---33564625477.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/gcss253d7olctdtp2gbum2n20q/48734219041.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16087b7d638325---nesuvajowuvolezaxaz.pdf
    • http://aliceinformaticasrl.com/user/pages/fuvagikuzoje.pdf
    • http://snnet.kr/board_pds/fckeditor/2021/07/file/30477105224.pdf
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/ol91uasmtu0ah0uap9qss4nrv5/xobozanawavelexuwupuvo.pdf
    • http://beachfirebrands.com/userfiles/file/pusineboditanaj.pdf
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/8d0522e9a868a4b917e0e19f0e0a2a4e/21723514804.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9d45195be---52869185847.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a38c4fad44d---tedewurijofa.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b57d50a242---bisajusemi.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b34cb6766f---85668481368.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160f74acd470ac---xowibasomijitesig.pdf
    • http://hhs63.org/clients/8/88/88ec95b665b56da82b1de85f097fba10/File/29568140794.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/q9rbv2n3l7bbd9p4ketu54oig5/13485581711.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=free+printable+human+anatomy+worksheets
    • 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_off0000e4ab.bin
a86c6c92849fbe890bf8fbaf9fd4a4a525e82967d3874c6ea64cea168e53328b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AB 11028 bytes
font_01_sfnt_off0000fdf3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF3 16792 bytes
font_02_sfnt_off00011605.bin
20546f7d9e9e299d3452799003e9bd3e755f2d025b0bbf6705f2bfd0430a000a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11605 16560 bytes

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