Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5e0032b0d54b4c6…

MALICIOUS

PDF

89.9 KB Created: 2021-09-07 04:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5e8671f01ab20d11bb501033632efee0 SHA-1: 98b9923a01e691540c853b35cc0d22d8a12831d1 SHA-256: e5e0032b0d54b4c6a2b6c15909ffa715158309e7118361cd8e38a447a9c42da8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains a link farm pointing to numerous external URLs, many hosted on compromised CMS upload directories, suggesting an attempt to redirect users to malicious content. The PDF's structure and the presence of numerous external links indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://jinsonmetal.com/Upload/file/kibepijikijitol.pdf In PDF document text
    • http://abwalabamaave.com/uploads/files/sijobi.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/lepifivadatozufewo.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/d239bb7152d2f061a143df4e1d3e00f6/kinozujolejapumo.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/44r144v93a2de80ofauf5oet04/pabasirutetibinodal.pdfIn PDF document text
    • https://atrax.eu/userfiles/file/91674758287.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/epm1c6bctiauje84ujha2rq4c8/wakegitak.pdfIn PDF document text
    • http://vds-construct.pl/userfiles/file/xisepogixa.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/6cm0t1sqp4lspk50qem9psruqc/dinerikitesojukuleniwino.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/68b24f2e6346dff1de591683fe809c1b/lepusawixofera.pdfIn PDF document text
    • http://mlead.net/images/e/file/wilofazekax.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/file/1629014682_1.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/kunadopidano.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160accbf015c40.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/jazegezutokegewodonobad.pdfIn PDF document text
    • http://rialta.ie/userfiles/files/wotopotis.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16085a6bedf840---jamalisifunuzodu.pdfIn PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/tesidufumugewotipin.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/vusuvetusubo.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/c9a11fdcf077d3b858ae5a03078f4bee/89293502281.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/nipu76b3jf5qdidqu7vio75e01/dagaxomejigafubabevozu.pdfIn PDF document text
    • http://petukmahaaaraj.com/userfiles/file/jamatirazomukazozesisu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=shotshell+reloading+manualPDF 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_off0000f639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF639 19564 bytes
SHA-256: dabb97a96c6a1788994eeefdf507cfc426821dabab2d72605f1ecf4f69897125
font_01_sfnt_off0001296a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1296A 10868 bytes
SHA-256: 3b44fed9b426b0b9b8e31b07b4e23e3e1a357db80bb8d672bad1d7f942611ed5
font_02_sfnt_off0001421d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1421D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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