Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ea070d50df3f938…

MALICIOUS

PDF

92.7 KB Created: 2021-07-07 12:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b81c448d2f13df36bb97073e1600bf29 SHA-1: 4574f725d46df7ad70a194660e8473285531d242 SHA-256: 7ea070d50df3f9381e4ada5525c1089c90714a0f546095f9f7bedcd0ed94a527
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal that the document contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm or phishing lure. The embedded URLs, such as 'https://drafthe.ru/uplcv?utm_term=government+spending+bill+2021', are designed to trick users into clicking by impersonating legitimate content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://drafthe.ru/uplcv?utm_term=government+spending+bill+2021 PDF link annotation
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/hu3oian3rgj01pq24u028n5rb3/99520708891.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/xazasuxanada.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160e32ccc34c4f---40575945204.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/47887221330.pdfIn PDF document text
    • https://renault-service.com/userfiles/xekowufivazu.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/wakijifapemusexoj.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088ffa5b0cfb---nunewapowuso.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/85803024751.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160b9baadadd96---47430349736.pdfPDF link annotation
    • http://cecev.com/stockages/files/wojozutimusebitekifewoxot.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/92194009513.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/6d066a534efd55fd456ffdd58a16bfce/busijo.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160999f713d7a2---17220325258.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/9b96bccf1393fd91ce57c0ff597a54d7/gisolixefuk.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/68590854345.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acfef6d91df---34834891486.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160dca8eb0b434---vuzexe.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a979d2fe5---37548775582.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/68910492862.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608630dca0eaa---bodasomuzedofizarexej.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/xovakomo.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c03463db346---gokuwesukuda.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/zobajanepafopebuvexodobom.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160898f3f60aa9---12668691178.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a423b1015e6---metosesosidaf.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E6 16808 bytes
SHA-256: 10add34cf280ec328ecd82673ef35dc8fcfb115e23f8b340a2cba896cfb2edac
font_01_sfnt_off000133d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133D1 11112 bytes
SHA-256: 3cf6120af5c9c56e6c57101d9c902fc3ad80714d058fe023e432e28438681485
font_02_sfnt_off00014d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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