Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0332146732076fe…

MALICIOUS

PDF

98.7 KB Created: 2021-08-26 09:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 2163fdaa667da5a3b6e4be7f0835c0b6 SHA-1: 9440a11ad99f1bd58915d8954f57a64a80217475 SHA-256: c0332146732076fefe03de4d259e8732966b00dc251949ce8355c62aa1435522
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content. ClamAV detected this as a phishing trojan, and ML classification strongly supports maliciousness. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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 https://bawaniint.com/ckfinder/userfiles/files/dugeduzotilumemap.pdf In PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160de94de55e7f---10902582674.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/genulunim.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/vamowupifixozupipezi.pdfIn PDF document text
    • http://cichanski.com/Upload/file/kafitexinavozabo.pdfIn PDF document text
    • http://alexhoffordphotography.com/temp/files/file/18511789989.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/hbeqcocii2i34cvdapqm2jprg5/wetafo.pdfIn PDF document text
    • http://armiikrajowej36.pl/public/upload/ckfinder//userfiles/files/vadinukumuv.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160978cd0de720---lejepen.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/levabavimukajuredukajok.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1c0d33c79---9572100994.pdfIn PDF document text
    • http://harekatmemuru.com/images/Media/files/zuxuwizozugaxe.pdfIn PDF document text
    • http://eraucheta.ru/uploads/file/talofosexuxarexofosurewad.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/q6kad21vj2r4c27g7huscvem2u/kuzifufaxaluwumitozenijo.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ffdecede005---xukerukewemubelulafasil.pdfIn PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/43286792701.pdfIn PDF document text
    • http://scottleddy.net/clients/862555/File/78410439019.pdfIn PDF document text
    • http://luatsutiengtrung.com/app/webroot/uploads/files/29162831455.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/4o8g0lr1htksp6n6142lins6io/66403629293.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/68125776813.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160879060d6b44---61291293719.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/efb24a68af0d4e1889dae6fe27edf67f/27107929408.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/atafdpudvlqfb1tmp7bmnmouva/lolewomiwizapu.pdfIn PDF document text
    • http://ros.by/ckfinder/userfiles/files/21144357610.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=rockstar+full+movie+with+english+subtitlesPDF 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_off00011909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11909 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013120.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13120 11312 bytes
SHA-256: b45d4586c5a117acf3cd78eccb5231121c4254d4fe7437f0172a8128cf9a00b2
font_02_sfnt_off00014ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BA3 19112 bytes
SHA-256: 3886f885d3e2d76e75933e45297335865c5aa8513e0d3f3a818c99396fbf904e