Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6aed33b7328be5c…

MALICIOUS

PDF

88.6 KB Created: 2021-07-03 13:36:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 23c699d060279a5b388b5d4a59f73a93 SHA-1: b2d6c8e7e9128c89bfe6286d55bd5b191f0332a1 SHA-256: e6aed33b7328be5ce7f5ba2dd8a0eeffd1997bd12c570baf58a50012181dee9f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple heuristics as a link farm hosted on compromised WordPress sites, with a high ML classifier score and ClamAV detection. The embedded URLs likely serve as lures to redirect users to malicious or phishing content, consistent with a phishing attack pattern. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d1f85349e---95924918811.pdf In PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/jhim01dm8v3sq8vl489ltjch2l/20446903936.pdfIn PDF document text
    • http://dilimkebab.com/userfiles/file/75513928587.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/juzubufonojoneni.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/donikimaz.pdfIn PDF document text
    • https://ka-base.no/images_content/file/61933621735.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1607b91db44a3d---32430955110.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/5496879065.pdfIn PDF document text
    • http://cpk.by/ckfinder/userfiles/files/nobejow.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075de56786ee---jimubuxis.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/kotutirerubowuzafiwik.pdfIn PDF document text
    • http://bagumul.com/file_upload/spaw_upload/file/20210503195715.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7548fef1c2---89802498479.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/42402763797.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/28370485091.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/08c105ca4d195ad4ccfb6a94fca79fb4/52417659704.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609dabeb31533---liloxibigapega.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608880adbfff9---suxawifejipupopuvek.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/cbf604004504cc96c7039fac021141ff/roxudigisiwapero.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b54f8d7b4---libuvegevoxedekuta.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc1e5601bd---xunojusokolu.pdfIn PDF document text
    • http://katachizu.com/img/news/files/lozavuzuxedasi.pdfIn PDF document text
    • https://aspirans.com/files/file/jovolaxagonapofedigokufo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=my+free+canmPDF 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_off0000f65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65B 18304 bytes
SHA-256: 67843a75122f08eb444aa03e578faeb8bf2f5f5c57f44f09d6ac672181e6e9d5
font_01_sfnt_off000126d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EE8 10080 bytes
SHA-256: 7e6e9332cba9786388f5482ce50a44de1ce72a121ad0b77c808bf828c647eb5a

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