Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0e37a2a5721d67a…

MALICIOUS

PDF

72.2 KB Created: 2021-09-04 07:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9ca4fc021723c97fa0939ebbb2401870 SHA-1: e4dcbadfc2e21e12d12803f24a410c470d0a85fc SHA-256: a0e37a2a5721d67a8dc2e1481527c2ffc348c5b398b161f182fe4f0991086a65
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to multiple compromised WordPress upload storage locations and disposable hosting sites, suggesting an attempt to distribute further malicious content or phish for information. The presence of external URIs and link farms indicates a likely intent to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607edb0a3413d---wejagubum.pdf In PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078efda74393---vosalugimobobakejote.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/68815312820.pdfIn PDF document text
    • http://moscowfashion.net/content/xuploadimages/file/56827306810.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/buwogaziviwevafij.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3bd9cf76a---puropabiwigabewosigu.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070026778593---rofixanat.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/5f5d1d1ce805f5636dd9d4aeb34a322f/zijakipuzekukiligovowob.pdfIn PDF document text
    • http://bluiettgriffinwilliams.org/clients/2/2a/2accc941c041fffeac9751862bb8fe41/File/mawizipifenazufuf.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/27466990292.pdfIn PDF document text
    • https://www.saammohaseb.ir/wp-content/plugins/super-forms/uploads/php/files/40c2a9c0dca6b84f8ca66c57d3098590/14809656961.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/av19u2ivmv49cg6cu66kfn8ldh/zuridivelawifetalepadexal.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/71002231405.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7575cd8c8---19660362553.pdfIn PDF document text
    • https://techinnsrl.com/writable/public/userfiles/file/72811274238.pdfIn PDF document text
    • https://debo-fit.be/userfiles/file///zisopu.pdfIn PDF document text
    • https://terryhaas.com/wp-content/plugins/super-forms/uploads/php/files/758d977459d8888d9ed364f8ce81c37e/mokejuxuv.pdfIn PDF document text
    • http://ih-consultant.com/ckfinder/userfiles/files/mudugexok.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/0b7e3f282baf62431af4cbddf1e133e9/xenubepufe.pdfIn PDF document text
    • https://deitratech.com/userfiles/file/39396630727.pdfIn PDF document text
    • http://www.oneworldkarate.com/fckeditorimages/userfiles/file/47432014270.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/25f23c7be30220395dde8369d9891de8/varodazavuwevobel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=btec+sport+revision+worksheetsPDF 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_off0000b85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB85D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD074 10560 bytes
SHA-256: 1c179bfc45451129e9a6d053a2f278989e108850789ca59ce6295eddd6c127c6
font_02_sfnt_off0000e893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE893 16708 bytes
SHA-256: 46930d2b97acc72b50d2857e670c1904fa06e6d58daefe4e8395e1eea59f3448

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