Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0b47b278d9b951…

MALICIOUS

PDF

76.8 KB Created: 2021-09-07 20:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 84dd7c5de489c6d04d9eb22084e9e47e SHA-1: de4a5140bf0cfe31766bcebb91b055e0706e44ac SHA-256: fd0b47b278d9b951f3e7b86307ae6b2ff1c917375c2431b09f34b6f269a81c3e
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites under the guise of a bank document. No scripts were extracted, limiting the analysis to the URL-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://oniceh.ru/uplcv?utm_term=bank+balance+sheet+analysis+pdf PDF link annotation
    • http://www.siposferenc.hu/html/favutewapuzifarere.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/9d25d01d38de983b2f136134d84ea497/26865863083.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/kotajevupizofawemajupaken.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/dumirozamizenev.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/712f2e4c06f40f2bc6320a862791034f/digisuguwewu.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/6iiqck4n9u71jmlfnhq0bviei6/jugilozasif.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/86524858990.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611aa80d719ce---84770180236.pdfIn PDF document text
    • http://lltsg.com/uploadfile/file///2021062322314858.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ef9de5daf---64658998749.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/72090445359.pdfIn PDF document text
    • http://didopack.com/files/33080788648.pdfIn PDF document text
    • http://myboydfamily.com/clients/7/7f/7f513a2250c12de81a70a6735749c289/File/64488910575.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/30265177222.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/xumifezegupexirafuwow.pdfIn PDF document text
    • http://cu-mbc.com/ckfinder/userfiles/files/zakerom.pdfIn PDF document text
    • http://suncitygroup.ir/basefile/suncitygroupir/files/maxixu.pdfIn PDF document text
    • http://teckim.it/themes/userfiles//files/dodal.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/d80ed00a7bcdb742643378bfcde9a5dd/jofonepudijobavodoven.pdfIn PDF document text
    • http://unicorn-furnitures.com/d/files/80529950272.pdfIn PDF document text
    • https://vresponse.net/userfiles/file/finuf.pdfIn PDF document text
    • https://alcoquimicos.com/ckfinder/userfiles/files/jetapisasemegesaveruju.pdfIn PDF document text
    • http://vinhthuan.vn/upload/files/resizenimeratokupofu.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC86A 17204 bytes
SHA-256: 906beecb8046d896e7161bdebb7418f6fcc07c34b855e12aa1d3436d015d8579
font_01_sfnt_off0000f4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FB 10896 bytes
SHA-256: 8ff0fa4f7596f2066feabdb3590e2af5de9ef9c67055e3f5c200e47130118168
font_02_sfnt_off00010dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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