Malicious PDF — malware analysis report

Static analysis result for SHA-256 75058191c60f5bb2…

MALICIOUS

PDF

77.1 KB Created: 2021-09-03 18:16:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5ec76fbd4b91a24912f42954a232a0b6 SHA-1: e8cc44c64d3b615ec71d4ee86b67b1d4708245b3 SHA-256: 75058191c60f5bb2ad9037fb2391051514e4006b906fde2bea8d439ae1712c0e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier, indicating malicious intent. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The document's structure and embedded links are designed to redirect users to potentially malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/6811166a0287d1cde5d4525279f9ce8f/zawita.pdf In PDF document text
    • http://visit-pune.com/userfiles/file/zemakonaxazipuxerugazi.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/c6a653d31350b44432420f3c335a85e6/82761813923.pdfIn PDF document text
    • https://bhandarisurgical.com/ckfinder/userfiles/files/fipezisosokaziso.pdfIn PDF document text
    • https://drbumbnursinghome.in/ckfinder/userfiles/files/754629010.pdfIn PDF document text
    • https://michelbarbot.com/upload/files/20644975725.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160de273f23ff1---xununave.pdfIn PDF document text
    • https://skatrip.com/basefile/skatripcom/files/gipumivuxafuxeruwi.pdfIn PDF document text
    • http://netpost.vn/upload/userfiles/files/nodixoxinezopevuta.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents/files/xabeburenubinozonenuvafuv.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/41093843455.pdfIn PDF document text
    • http://mdknoodles.co/uploads/files/kujakusugubulugowaxolo.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9d054b190---20162628624.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/bevumojumi.pdfIn PDF document text
    • http://www.mustwalge.ee/data/content/files/18754574693.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/4a6ecfcbdd0d31d03400598388078566/94126488378.pdfIn PDF document text
    • http://clingac.com/d/files/75031340893.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723f837a97c---mugedotufugibo.pdfIn PDF document text
    • https://xeroxexpres.cz/userfiles/file/basogusivujuwalevado.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160abb0a772ae6---31889706260.pdfIn PDF document text
    • https://ksuskalology.com/images/file/7611560183.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/8794449232.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1a4cb5984f---xizatutajunidase.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/79hsk6aptt68m3ufmfnte6esbt/37537869002.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854de6eeb08---pirorosiremurukekufowu.pdfIn PDF document text
    • http://www.emailposte.com/pictures/janodivo.pdfIn PDF document text
    • https://bodymart.in/ckfinder/userfiles/files/posaporadesukuxaboligu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=kyocera+3552ci+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_off0000ccac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAC 16200 bytes
SHA-256: aca85ef6d4ab2bda0997f6ef376c13aca9cfd75c462e3558af50ed8e40cf89bd
font_01_sfnt_off0000f618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF618 10728 bytes
SHA-256: 10ffe1e6ef04fe3fd0191255677fcbbeab2a980f0001d6c0f44c5e6ff7e4d96e
font_02_sfnt_off00010eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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