Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a94ee811ba2f157…

MALICIOUS

PDF

113.7 KB Created: 2021-06-30 20:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d040b4bcaebd55b9846fe9d207595848 SHA-1: 521f1746ae487cc7f329ec03a13af7a6767b9675 SHA-256: 0a94ee811ba2f157ef7706bc0c361d51088c067e1a8f68dc288e2996a894d587
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links pointing to compromised WordPress sites and disposable hosting, forming a link farm. The primary purpose appears to be redirecting users to malicious content, likely for phishing or to download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://allytemp.ru/uplcv?utm_term=final+fantasy+crystal+chronicles+remastered+play+store
    • http://yishiweb.com/upfiles/files/20210530_005735.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/4tqp3rjeofkmdfs6rfv4av3151/telopavik.pdf
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac4d7f12f2---91815696388.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/621e244f329891c684081a6a6217cd6b/33286243001.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/b166e7458282f35fea6c9b54a5a5ed59/8962453859.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/rbki53hvjtd5c882epci69ecb4/vedufefadesekivowelen.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160877d1916da2---83448099244.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/bf628d7b643394ae5103afc9d37f75dd/pevibup.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/cdabbbe083c00fb0820ef58bedaad919/loxukitebusa.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/ec637ab96ebed23e584ce73fa16e0cdd/pimezibosodalezigi.pdf
    • http://ural-resyrs.ru/data/file/95042560648.pdf
    • https://itracmediav5.com/ckfinder/userfiles/files/kudifawazifukitupusodube.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a91b6bcd7---wunonobimazopuravaf.pdf
    • http://jngf.cn/files/file/8528160829.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/27d814cf8dce7dedbb72435b611aa29c/fiwol.pdf
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2b752ce12---zowim.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090df37edcdf---wapiximaji.pdf
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/ae9fa0d860a8e771beef671c0c09b74e/riwawoxalumobaseluzufuka.pdf
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/2a90872865e5180a536609e91f9bb4b0/97980430054.pdf
    • https://dienlanhhonganh.com/images/pic/file/remipojosasaruvip.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b4a429ff5---mupufineruxebatexaton.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a0884a99285---kawovog.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/ncqdjkojf843heg4sjmqu8des0/32366411666.pdf
    • http://pettwayfamilyreunion.com/clients/39389/File/19337032791.pdf
    • http://oishisushigd.com/uploads/files/ruzusesejejuzuvar.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011542.bin
eb0bcb08964b2636f2a09e10661793d98bf1f269e6de8db40f495f25e0e4308f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11542 10976 bytes
font_01_sfnt_off00012e8f.bin
999a52d71b47b4679a2754b37629347c42e0f6d04a7eb76a2f1f9122bff2770b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E8F 18916 bytes
font_02_sfnt_off00015f0e.bin
662f2e287355203250293ca174474811f32b104a3b846f8957de5406785bd89d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15F0E 22176 bytes
font_03_sfnt_off0001a086.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A086 16792 bytes

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