Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d701a28e1e1ed4…

MALICIOUS

PDF

78.5 KB Created: 2021-07-24 03:32:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c794ef37e1ed60450725432598ba53b7 SHA-1: 974ec6bc2769dff9899692860a16bb5e8e42b4b0 SHA-256: e3d701a28e1e1ed4e7a18cac1447851bbb8e83144a8e881cd00c6d68a80e3bef
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to external websites hosted on compromised CMS platforms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further malware. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad2d825103c---94003839547.pdf In PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/c718c12a3771864efa396cf7025783f4/92671963462.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/50944449568.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/79911785418.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9d4987c18---9847344940.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/gotunivekigutut.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc3ddc05d1---17716942255.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dd3866a00---potajuzipesos.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/247f79bdbe3ae89f7a8b7aad96d94344/81678856246.pdfIn PDF document text
    • http://ykzn8.com/upfiles/editor/files/54073453078.pdfIn PDF document text
    • http://ambulanceservice.pl/userfiles/file/84761198259.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1163c4a35b---bakewuvojuwapew.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/ff22b2d4b99e2661a2c65d3c4195eb33/tolimifaxegilodabux.pdfIn PDF document text
    • https://eminenceconstruction.ca/viking1/uploads/files/joxibopasuw.pdfIn PDF document text
    • https://netlandschool.cl/files/1474205938.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160db2ba83f473---bezirefowoxusumofiwu.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/gipapegomigigixarux.pdfIn PDF document text
    • http://scro.ru/pic/file/76520714187.pdfIn PDF document text
    • http://kondicionery-lubertsy.ru/upload_picture/file/mesulud.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/59062235ff106ea475182bc2b06e0558/38383831041.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/25360316508.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/e1f0efbefd3c28344f1d0277b62a4677/29126090720.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2d3179d57---89811581188.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=les+pronoms+relatifs+qui+que+dont+ou+exercices+pdfPDF 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_off0000cc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4D 11088 bytes
SHA-256: b13bdaa450b4da472bfc19dd0c6080ed674e5e05fe9dcf761746d4956aec092c
font_01_sfnt_off0000e5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE02 17624 bytes
SHA-256: a1579307babcb5b100cc77211c6cf9bf0823fd4ab28b14564a86dea5caeec0ea

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