Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bc2edab857b351d…

MALICIOUS

PDF

99.2 KB Created: 2021-08-13 08:27:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 040daf1f2c7d2379fe53fcdb81916028 SHA-1: 69b76f57a156b02b9a09d09bd59af5de53a5c083 SHA-256: 0bc2edab857b351d75446ee6d3d2a1c29af0144d559ae40fbcfd28a77fb80d76
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites and disposable domains. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://laborke.ru/uplcv?utm_term=carte+de+l%27europe+vierge+%C3%A0+compl%C3%A9ter PDF link annotation
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be800db2736---xixamikonaz.pdfIn PDF document text
    • http://globalquestconsulting.com/userfiles/files/panodatudi.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/nupekalinur.pdfIn PDF document text
    • http://gewoongroen.eu/app/webroot/files/userfiles/files/64732862532.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/jerutalixamomevunudawu.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096ca53778c1---metaxovovabemibemajenukip.pdfIn PDF document text
    • http://bsa.by/ckfinder/userfiles/files/26777596513.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/jutokoxema.pdfIn PDF document text
    • http://phrabat.net/UserFiles/File/93714102722.pdfIn PDF document text
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/89339176913.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a07c31720---97737371530.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c683b743a83---14393503238.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d52db38cf2---41994200521.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/fevamofo.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/bujupaxezabarirodotad.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607289bc79120---81248272282.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/mafokivu.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/1115df1ce0506348ca3aa6259359b6a2/24069632015.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/91771282686.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/q7jo7jpjc5cc03a5k6fb3jv4jj/mudonuturewasadaxupa.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/toresivepixakikudakowedug.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d92fe8002---nibozewidofusojosu.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/51056240823.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16093c9516a7b5---71743728952.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_off0001181d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001302f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1302F 19960 bytes
SHA-256: a394ebb2bfcf4ddde0b902992735f01573042c085d01be96cb153e445e82f5c8
font_02_sfnt_off00016296.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16296 11156 bytes
SHA-256: 28f557747e5c84aba4a5b649777206dc4f73c18a36482dfa84103fdb143c5f07

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