Malicious PDF — malware analysis report

Static analysis result for SHA-256 40efd5182d7f8fbf…

MALICIOUS

PDF

86.1 KB Created: 2021-08-22 00:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 63e6fbfd324665b052ad37bcc14cd27f SHA-1: ca5eff8303026bf1d63fc63cca1dc4c491b66f35 SHA-256: 40efd5182d7f8fbf16bbc157040bebeb97887532c84d291a29a0a94a8eff54bc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of link farming on potentially untrusted domains. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to redirect the user to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://ketchas.ru/uplcv?utm_term=2012+honda+foreman+500+performance+parts PDF link annotation
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce6b604bac---wotet.pdfIn PDF document text
    • https://www.auto-ecole-acm.com/ckfinder/userfiles/files/rizizigipanapaxim.pdfIn PDF document text
    • http://siamsankyo.com/Uploads/file/23640790067.pdfIn PDF document text
    • https://espritgt.com/userfiles/file/26903815043.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4fd42c9981---wuseburegoseguwoj.pdfIn PDF document text
    • https://art-gallery.mn/uploads/files/raxudos.pdfIn PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/dalufepobugupodarolim.pdfIn PDF document text
    • https://zagorjeadventureteam.hr/files/81538587795.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f222a8d70e.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/14387691385.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/48a604692869ee03e53858559c3d68ce/67292345929.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/86c4a06054c5a1876e56d6efa0da82e6/15628559129.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/watuzategose.pdfIn PDF document text
    • http://unsersohn.com/images/file/garuwewabexoverupe.pdfIn PDF document text
    • http://world-spa-resorts.com/dok/rozaw.pdfIn PDF document text
    • http://2016montemayorreunion.com/clients/e/e5/e530e98a7ee505477716bae2fe71cdef/File/gunapedilifewad.pdfIn PDF document text
    • http://embeddedhr.com/ckfinder/userfiles/files/789932769.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2ee2ffc9f9e986286cd8e8a331d9fe8b/38600411029.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/dusukinowegodasu.pdfIn PDF document text
    • https://kaptenhoki.info/contents//files/suxofatezaxividegituwinab.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/v28vlsu38iop5qof7l6bhbjss5/fugikuwumenatemi.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/77870465440.pdfIn PDF document text
    • http://pro.ovh.net/~tribuene/images/banque/file/35737952969.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_off0000e9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C7 17640 bytes
SHA-256: dce7beb3aad99dd6354db142d9dca5eeac4ed00d448f8715dea3d822f0e1a968
font_01_sfnt_off00011840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11840 11076 bytes
SHA-256: e5fbee76279087fd86f977cd8295f8f5c1855dd17f48e4e38527ce1cae792667
font_02_sfnt_off000131f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.