Malicious PDF — malware analysis report

Static analysis result for SHA-256 c47033979c50465a…

MALICIOUS

PDF

109.6 KB Created: 2021-07-26 08:10:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ea4bd465e8209bc0aa8a3edadb2a0359 SHA-1: 670ac0b2a4f01075b2f74c63d71371a4dc317ec3 SHA-256: c47033979c50465a42b7c5c18c7926693a02af44b71cbf1ae8e5b40b8040dd89
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm hosted on compromised WordPress sites and disposable domains, suggesting a phishing or malware distribution lure. The embedded URLs point to various PDF files hosted on these suspicious domains, likely serving as the next stage of the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

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://vipnovini.bg/root/f/uploads/files/kuwukomapi.pdf In PDF document text
    • https://charlesstreetvideo.com/userfiles/file/zusofuperedog.pdfIn PDF document text
    • http://capitalclassof1971.com/clients/4/4c/4c1e4f015ba9b8bec237dc1ca705466d/File/88546969974.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/gen44l0om2ej17k5a053pep3d4/4103705367.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/7b5214e7c6841a06ba2e6852c656e73e/litufumiludatigi.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/79923191620.pdfIn PDF document text
    • http://moskvaznaet.ru/upload/files/52042337897.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/hqoiqor6dh2m29ep7jchc8ue65/44647483641.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abbbce6ac34---naxujefewilibiludidon.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607796b470808---25427645068.pdfIn PDF document text
    • http://stylowa-pss.pl/userfiles/file/xonawu.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608c65ad1cd73---gapebuvisudizajep.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/wumevibenimaf.pdfIn PDF document text
    • https://togeltop.net/contents//files/17739602112.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/jemuzusodaketafovigetemi.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a41aa95d0a---mefomusunovokorikurulu.pdfIn PDF document text
    • http://birkhoffhi.com/userfiles/files/1667564792.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210726_5FE1F39E845C0285.pdfIn PDF document text
    • http://anpo.vn/upload/files/93169442952.pdfIn PDF document text
    • http://banner-ever.com/ckImg/files/mekumonesunumoz.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ce2ad08fc8e---tijerixosezevu.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/642d9af6c1c3c1c1294e34d0044c9e3e/55696519976.pdfIn PDF document text
    • https://madopin.com/calisma2/files/uploads/luritojesedenevir.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca6c70876a---31308185856.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/fatmnm84s457oupdguplv06u66/96407689755.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/ff408175d179c01ec8ac0b82969cd215/wusirudigojovuvawefew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=articulo+recurso+de+reposicion+codigo+general+del+procesoPDF 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

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_off000148f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16108 10768 bytes
SHA-256: 0190b068886d0b6bf0850deca10e6296bd10069ac8e4ae411964d794d8bfa0e7
font_02_sfnt_off000179bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179BD 17404 bytes
SHA-256: 7e728168695ba01ae79e1acc059bf38647564ad80a20b8ff17c54ce71cb082d5

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