Malicious PDF — malware analysis report

Static analysis result for SHA-256 71e6d5fcee1687ef…

MALICIOUS

PDF

76.7 KB Created: 2021-09-05 17:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8539c5bacfb17b1c0792f3c18bab5a24 SHA-1: 326281d9d84acc87ec5cfd44636a51f50bbec874 SHA-256: 71e6d5fcee1687ef8efda132e0873b6a889418270d0441998d6abe4f775f7b0f
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to numerous domains, many of which appear to be compromised CMS uploads or hosted on disposable domains, suggesting a phishing or malware distribution attempt. The embedded URLs are designed to redirect users to potentially malicious 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://allytemp.ru/uplcv?utm_term=role+of+internal+audit+in+corporate+governance+pdf PDF link annotation
    • http://darienhigh70.com/clients/878490/File/gupopatiwebek.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/6833b880ea430cfa85f2e589f0d13327/gukipezasitowikisena.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/74294732707.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/lifezoriregugefexejitum.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/47102171189.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/104b05ef586db27554764f235cb26f13/3522856611.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/raxesezaropevisamajemu.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f088a845e---950131752.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160a43ccc13cc6---vapavapirofizejune.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/wopapipenos.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/7421775cc917cb77da37afc3894cca49/fizuvaxivitizalogoveda.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/mijexegenurumone.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/dejixelepoja.pdfIn PDF document text
    • http://mylodge-naoshima.com/28219933020.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/njr4r7eo7rako5f1no2jmg3uo6/65180028448.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/sugutewukuzufodaboj.pdfIn PDF document text
    • http://archidaldegan.eu/userfiles/files/32657192625.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/9908689692.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/zatawabavurubule.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/brfud7na3vg677bseeds22dj22/fulibejixemugetabatolu.pdfIn PDF document text
    • http://temple.mo/userfiles/file/55913682781.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/4833ebff4a27fd8a16ef7fe19b517ea8/40668493289.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_off0000cac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC4 10840 bytes
SHA-256: 6617e338fdbbc6f77dfa6befdca9c8e22dff13e174c74686624fc43a5a5516f1
font_01_sfnt_off0000e3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AC 16084 bytes
SHA-256: 24415fdbdc7fbd81b2fac56e39120c795a1b2644cc5208b28995b7592ac01989
font_02_sfnt_off00010ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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