Malicious PDF — malware analysis report

Static analysis result for SHA-256 894345bcac94a881…

MALICIOUS

PDF

87.0 KB Created: 2021-06-30 11:08:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ee4ab417b3a2d72c858af46329b77796 SHA-1: 176b4aa2bbc806ce43fb19b431f2f9421efa887b SHA-256: 894345bcac94a881df17b908013b2a4d1617e5fe9177861dc955eb619967b933
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple external websites, many of which are hosted on compromised CMS uploads or disposable domains. The primary purpose appears to be to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://aivieksteslaivas.lv/userfiles/file/lemarebisofuxugan.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/i0sg8km4jktf7da8gro6qunqtp/69704665462.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9b179b5f7---bivojiwefigozanudokape.pdf
    • http://pathtojanna.com/userfiles/files/9085934790.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dba7f963f16---fupixejapanasewob.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae32a51f410---99817536439.pdf
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097ee1d0f3a3---55616739104.pdf
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072ffdd8312c---gikudozuvolavuxilaf.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/5d8421d9a36605062e7e91081fb50d2d/titimaz.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609461ab347f3---87401303869.pdf
    • https://africanresearchcenter.com/userfiles/file/zexirowivapoxomasez.pdf
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c72ffadf556---gisepebofolobetupaponoka.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/2cdsjhjfmk1308vgqfmops1o2d/biwisuwevuvif.pdf
    • http://geredekombiservisi.com/userfiles/file/vigowutofek.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e69ceed4b---43548363247.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081cf2c215be---90335724729.pdf
    • https://psg66.ru/admin/ckfinder/userfiles/files/76736362364.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/r2n62jgsmijm8i7plgd0hrjgh7/17905755018.pdf
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/8425d5d4cc7496f88b4d69c35190d3d9/memalegenenulajudadamituk.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f3976d986---24096225843.pdf
    • https://atrax.hr/files/zobatavesosepujuvivumo.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a64021d824d---butagasexusupedu.pdf
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/munovawetemugilebomi.pdf
    • http://arslanemlak.come/file/71636526195.pdf
    • http://henrysadiereunions.com/clients/876463/File/16014135432.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adcd7308906---sidutasevidinafina.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=what+will+an+interviewer+ask+me
    • 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_off0000f2c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C5 16792 bytes
font_01_sfnt_off00010ad7.bin
a1cd6a34705b2bd188c2e5d8e438d63ad7192efe5efee6ca3d5349769a9528dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD7 17004 bytes
font_02_sfnt_off000136e2.bin
ec122c4c66aa2a866c19ca8b7bddbf70c8a8c09404daadbd2d0119901fff298d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136E2 10492 bytes

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