Malicious PDF — malware analysis report

Static analysis result for SHA-256 e00407cac3f7ee28…

MALICIOUS

PDF

104.9 KB Created: 2021-09-05 13:59:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7f0c147d565f6d234b03def658c4feee SHA-1: 09de346dc7d8cb9e11e4dbb6fca98388096a064c SHA-256: e00407cac3f7ee28ff57d73bd391c1cbd3b9e8bd71df3cc0f771236991f6f527
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://pistant.ru/uplcv?utm_term=porsche+911+carrera+s+2006+owners+manual PDF link annotation
    • https://boumqueur-edition.com/upload/fckeditor/file/maxume.pdfIn PDF document text
    • https://signika.pl/Upload/file/94454349103.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/unh5kttur2sp9em0lokfsa73m1/52218915339.pdfIn PDF document text
    • https://all-new-wow.com/upload/files/sedegufudemi.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/rojazibafari.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/ek1aaltdadsht5tu9os97fvqa3/74427542001.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16083986f5e205---64599789544.pdfIn PDF document text
    • http://epmachine.ru/d/files/11900178001.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/6c780f366838394f6b116e48b0d81bda/genexegutenezulasivadokon.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/11ah0n9cagjhfk7ph7j94of13u/gurogevinof.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-5-24/20210524234439589142.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/bamepese.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075c0c9b58c4---48118905923.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/94gcbbu6rtiipqr229n3jsb1gp/tosugamamikufuvabuze.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/3v66k7lgmv8rk50fpmcfdkvng6/damusawerenufapaxawizoki.pdfIn PDF document text
    • https://www.loscam.com/lib_common/ckeditor/ckfinder/userfiles/files/kugibefesuv.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/53051792428.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610799c9f3c25---35279353866.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/94074d21f318228dc95e9b4ada9eb5d7/17747840757.pdfIn PDF document text
    • http://baraanduliaptti.org/userfiles/file/kibazerunagipajekerixagav.pdfIn PDF document text
    • https://rlmahtani.com/userfiles/files/68801669739.pdfIn PDF document text
    • 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_off00013113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13113 19424 bytes
SHA-256: 3f67d039b242b5abdf5eabee2dacbae85029d4956f6dc9bf9736a2868c30cfa6
font_01_sfnt_off00016418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16418 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C2F 11124 bytes
SHA-256: f86a059f81b54405c21d61f9e4acd9863c537d4386b8097d6885fa7d703f1f94

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