Malicious PDF — malware analysis report

Static analysis result for SHA-256 e08a30186a92f3de…

MALICIOUS

PDF

83.3 KB Created: 2021-09-02 22:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 91b2d1562d28f44525305d3d2de2c88c SHA-1: 8427413bce9aacc00594568e1c0d0d68a558cbec SHA-256: e08a30186a92f3de9b772e1a831ef2b9eecc1f3cdf1a7f893b1968c337a6d481
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, indicating a link farm designed to redirect users to potentially malicious content. The presence of these links suggests an attempt to lure users into visiting compromised sites, likely for phishing or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://wedding-box100.com/uploads/files/202108211923394633.pdf In PDF document text
    • http://e-photo.lv/ckfinder/userfiles/files/foselonapenekex.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad212157fdd---40230310494.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c47839bfb---bafigixodifasupuseg.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc612ed516e---20615981693.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/5828394a5156ae58fb46faaa25544738/vekifipe.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/53419133306.pdfIn PDF document text
    • http://mxm-hosting.nl/img/editor/file/kapuwasevafara.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/13b1b6d3165347a0a3d0f2071df36db1/pinalategezajusamujef.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072db3d59b53---43682103655.pdfIn PDF document text
    • http://cloverdiamond.com/file/suvopopetozenabusemarovu.pdfIn PDF document text
    • http://studiodugnani.it/userfiles/files/21998107327.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/4531177180.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/41bcfb804af21f957a7b8134845854bd/32042777374.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/a2505970aa22d7f0057fa7fccfb26456/70206491919.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607659cd8fb34---zabazulejuvuwiruruwo.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/89256619951.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160bca3649e25e---19523678667.pdfIn PDF document text
    • http://wrhs1976.com/clients/0/08/080801f2a31a95d446b71e9836a5425d/File/40574007113.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a069015c86e---11006133166.pdfIn PDF document text
    • http://inbond-cn.com/userfiles/file/toxevemafuvomezutagolab.pdfIn PDF document text
    • http://belgium-ex.com/images/blog//file/96368791378.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/661e2726c7ec61b4aa1ed09ded703487/soferetupakelubibebizuve.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777552570cf---87092124313.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=the+lady%27s+guide+to+petticoats+and+piracy+pdf+freePDF 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_off0000dd49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD49 18200 bytes
SHA-256: fe01c9888a72d39da70c3662969f7a07a9af7c144c223f59e11e20b3c4363c88
font_01_sfnt_off00010d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D10 11108 bytes
SHA-256: 966bf3fb208c4d737e7ec535ef9fb109d44e2bf92d66d56b7bb9b1809237be5b
font_02_sfnt_off000126c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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