Malicious PDF — malware analysis report

Static analysis result for SHA-256 007387df25e3ab99…

MALICIOUS

PDF

72.5 KB Created: 2021-09-06 04:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: cff0c8e8de96f14d0b5657c5790ee8a1 SHA-1: 64bf84ba30a0b5e558b9cb2091dc3908ce8ea71d SHA-256: 007387df25e3ab9961cc99fb91993d4444c6d702c58f07ad66a5f1fa4181ee6b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://binarbaidtrading.com/public_html/userfiles/file/dulirobedamabopen.pdf In PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b40ee744b6e---lumox.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/6677691756.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/disudupogeso.pdfIn PDF document text
    • http://oreoltour.ru/sites/default/files/file/noxodulekasizo.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16086d9d737839---bapowezituxavejutegawijup.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/u9mo16ts9r8akt1anjfmtjv8jt/25148067736.pdfIn PDF document text
    • http://anindecor.pl/files/file/25022659599.pdfIn PDF document text
    • https://viadagio.be/userfiles/file/medigux.pdfIn PDF document text
    • https://ooobelkom.ru/ckfinder/userfiles/files/3432433335.pdfIn PDF document text
    • http://edu-tur.ru/userfiles/file/91425217027.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/riparonafagifuzutenogivu.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddbc9e89d47---75870852612.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/6a110dafb68ea723e8ca8f764242fb4f/ledojegoxipiridu.pdfIn PDF document text
    • http://apvn.info/userfiles/file/buxejebola.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d7c2a79d6---wuzutawusasajileguwoduzan.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/51681013382.pdfIn PDF document text
    • http://aviteksural.ru/admin/ckfinder/userfiles/files/72863757712.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/02d7029c48160d4c25171595ea6f59cb/soviratoxejedavisudusa.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16121b94f073b2---16347351559.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/71414038118.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e54dfb3429---78743281375.pdfIn PDF document text
    • http://seoaudytor.pl/userfiles/file/ziwovel.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/p8pat5derfronnnknj1f2c2cb3/52802259064.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=weight+lifting+program+for+beginners+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_off0000bb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB16 15756 bytes
SHA-256: 3eb39337d70549683914b03ce87aa2edeed1e279c11c7d2e80aca8286bb2ff30
font_01_sfnt_off0000e2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A0 11076 bytes
SHA-256: c94a49ca9bd40270e476ea9e8386049ad3d4292da42e1d87521a1f780b98511c
font_02_sfnt_off0000fbc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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