Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda86048d132b97f…

MALICIOUS

PDF

87.8 KB Created: 2021-07-17 11:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 437b8a2e78a2e78bde0b16cfaf6d0fdd SHA-1: 352ffe5826c1d0cda731aa1602e580b01195bf23 SHA-256: eda86048d132b97f461d1e167978da12f830537f7ec12b1919000886eedd8a4f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing to multiple external URLs, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://winkeleninzundert.nl/uploadimages/files/64395683710.pdf In PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/7978317034.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/fb094a5d3291dc0d6597b9332745d45d/96425220367.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/d1a93261d0fdfb97a6eb9366ee1c07a7/vepewejekirejapar.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a4d4c98fd---zobimozoguvaginonu.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a918af0b3---vabilituxemokezupi.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad553b6462---17698250808.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608791f061f4a---ligumirepefit.pdfIn PDF document text
    • http://www.monts.sk/upload_images/file/13709325919.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9209f08ad---lekusij.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/46043653452.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/0e5559f66a6e0e2da55a46ad0ea9987d/kanuxipuvawurejo.pdfIn PDF document text
    • http://www.logomarcanet.com/userfiles/file/supipuditamenigenasiza.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/26102596537.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/20ae72f5d2bd07a350a1529e5390fd40/pewodukiv.pdfIn PDF document text
    • http://cedule-plachty.cz/files/file/bagisujewa.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021050201202972.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/nolekadololutenezobul.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16074213b8a670---tozufotinepepex.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/zivujokebama.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/16e92d1851e3a89ef0141846e2030634/vudorulebijixalumagiguz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=x+seed+4000+constructionPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E6 10460 bytes
SHA-256: 96fcb5ad052c2038b1f87c4b8c866c6a02ccec18289509159280a657bb294ded
font_01_sfnt_off0000ffbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBD 2036 bytes
SHA-256: 573158eadfcfb1f74a9ea41620d0346c0b3d4cb6a2fbeaf1921898fa80a45c52
font_02_sfnt_off00010916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10916 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12128 18860 bytes
SHA-256: c3cd5bdc05e1875ce8d110c1d1aa63a56933b9f5f2e9b11bbfccfb13006b344a

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