Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ea9fa506002d101…

MALICIOUS

PDF

82.6 KB Created: 2021-09-05 05:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 45ece5b470c7763926ff1b015c58e7a5 SHA-1: 94e320b3154d7bd735787bc3fdf4b43cf68f3d3e SHA-256: 1ea9fa506002d101747284e65f32a92edb6a02b899677a9ad307c43ad764006f
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to potentially compromised websites, indicating a link farm designed to redirect users. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The primary goal appears to be directing users to malicious or compromised external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071dea7e38eb---71645726677.pdf In PDF document text
    • http://dayou.tw/uploadpic/files/202109030518278537.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b496a265e8---47872714231.pdfIn PDF document text
    • http://statewideroadservices.com/clients/879378/File/pixoxovofemal.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/96668186618.pdfIn PDF document text
    • http://linza-market.ru/upload/files/8314314916.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/34034998939.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d892f63ba2---nibodadamolidibo.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bf040a8f013---15827304056.pdfIn PDF document text
    • http://skidubravy.sk/spravca/ckfinder/userfiles/files/46234223231.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a976c615ec3---99045778442.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769b29e00cc---31713598053.pdfIn PDF document text
    • http://iccjsc.com/images/uploads/files/tuvobisegewak.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611319175bee8---26198006237.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c988fc5f28c---62197886281.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/9ff6387489d6c42ea211d86215adaccd/nagovisowexuwijatuvu.pdfIn PDF document text
    • http://dancedynamicsla.com/clients/38740/File/fanadazi.pdfIn PDF document text
    • http://banghaija.com/userfiles/file/33806499559.pdfIn PDF document text
    • http://favourtec.com/attachment/file/jodopapezezipijo.pdfIn PDF document text
    • http://vititanon.com/user_img/files/49441744902.pdfIn PDF document text
    • https://gloriouz.in/ckfinder/userfiles/files/ridukuzogofifabifawo.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160832633ab6b5---22719025288.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles/files/71741543268.pdfIn PDF document text
    • http://sweetbasketsbyjackie.com/clients/864293/File/jamuzakulizidutosowa.pdfIn PDF document text
    • http://ahchala.com/img/file/vefitomudi.pdfIn PDF document text
    • http://thicongdiennuocmiennam.com/uploads/files/42631707654.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=elements+of+programming+interviews+book+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E2 11208 bytes
SHA-256: 3376e5258fa6d7d7282ffd22f7ed918b0778cc50d19bb93dc0f0280a0b999bfb
font_02_sfnt_off00010cb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB4 18476 bytes
SHA-256: 709b8a89562cc7c4fa8781db11d951b502999b3c460f599ee0f83aff37d346fc

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