Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda2957b2b63c032…

MALICIOUS

PDF

81.3 KB Created: 2021-09-17 09:28:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b202937c59da4cbfb66aa6ec5a77752a SHA-1: 94f26160957e2f26b2a6349b840651aa5d151558 SHA-256: bda2957b2b63c0326a1d435442f4e324b9e9ec97abf2f9a386dd1d7fbd78bb84
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS upload storage or appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://malovanesklomh.cz/images/file/38690657411.pdf In PDF document text
    • http://simonhoirup.dk/userfiles/file/metogotaxafojenenazi.pdfIn PDF document text
    • http://khyljg.com/uploadfiles/files/gifunoxuwuju.pdfIn PDF document text
    • http://sb-78.ru/files/file/35919456027.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eb5c57f0c0---88422152583.pdfIn PDF document text
    • http://builderall.info/userfiles/file/81929357945.pdfIn PDF document text
    • http://xn--h49al71atridzo.com/userData/board/file/jenotupamosaz.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/fejamo.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/78448121861.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141923401476---46557712752.pdfIn PDF document text
    • http://quranday.org/userfiles/file/44667532025.pdfIn PDF document text
    • https://ladangmimpi2.com/contents/files/wekenowekuw.pdfIn PDF document text
    • http://lyzjkgm.com/d/files/jodozurulumupusipabumibi.pdfIn PDF document text
    • https://digicpictures.com/downloads/30611324912.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/zijubepasokatazasumemuwiw.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed41a8c4fc---dobujad.pdfIn PDF document text
    • https://www.colline-eternelle.com/ckfinder/userfiles/files/10516383211.pdfIn PDF document text
    • http://volkshilfe-vlbg.at/images/content/files/24358803724.pdfIn PDF document text
    • http://yilbasipromosyonu.com/userfiles/file/32864739741.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/15964975872.pdfIn PDF document text
    • http://megamento.com/_UploadFile/Images/file/88777926904.pdfIn PDF document text
    • https://euronet.stonavka.cz/webpagebuilder/ckfinder/userfiles/files/56562659047.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/hnv9hhai8468lbjg8j1nhmtchn/95790456023.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/9g3cv9m4lfp37uludchmr952q0/42548829116.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/09afefbcce92061e3ea97cfff6806ec8/49220273793.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=siti+giochi+androidPDF 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_off0000d9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF210 10376 bytes
SHA-256: 806fcabde8dea68cecafa2b44dcf5a67a442ddcde1b4ea1056ad01ba0f6b2676
font_02_sfnt_off0001093d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093D 17620 bytes
SHA-256: ea700f4017ee7e44a295b006e60042c08018129376143b6078842013f7aaa716

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