Malicious PDF — malware analysis report

Static analysis result for SHA-256 282ef0d47f5b7d07…

MALICIOUS

PDF

81.1 KB Created: 2021-09-02 13:08:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7dc3c6997cab501edfc8929e8a19c272 SHA-1: 9f699db24a4a258f12ca3d02b7304ca2d9ff5211 SHA-256: 282ef0d47f5b7d07de4e71381811330e70cdac6bbed6c32a1a9615a066e3e32d
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to obscure the ultimate destination. The primary purpose appears to be redirecting users through a series of links, likely to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/0ded4111f954043c1dfc7025378acae2/xomifozarudasigegamad.pdf In PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/27397771789.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/23826562330.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608c084950ef7---9770640097.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/menewitenivev.pdfIn PDF document text
    • http://simonide.org/userfiles/file/43802292223.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/9vfgopkurgd0kpvsmpfgiike43/42593402403.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16097dac637fb0---lunetogosaderatap.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/d0c8307cee6573553a5b8fce7adcda00/dujenejumi.pdfIn PDF document text
    • http://studiotecnicolamanna.com/userfiles/files/98634879991.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/99b5f6ca91b8c1aae560baf43e2fb1e0/56296261106.pdfIn PDF document text
    • https://mystruggle.uk/indigo/ckfinder/userfiles/files/gexesevibujisexovopodifam.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/ca084dcadf6f6522f72cc3490d5554a5/vepinije.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/webibo.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/059e79c571326fe5e8b1574235f1f004/vebuxupux.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/01220769d7c3108b59a7255704684c1a/50724943625.pdfIn PDF document text
    • http://marketherballize.com/ckfinder/userfiles/files/zanesusomebu.pdfIn PDF document text
    • http://katheran.com/clients/55933/File/8202447748.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16127559f3c38f---fatebamitukimavularito.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ca7bf3873---sigaxanipadedo.pdfIn PDF document text
    • http://totoquynhhuong.com/upload/files/bubuwe.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/luxeruru.pdfIn PDF document text
    • http://gw73patriots.com/clients/1/1e/1ed986c9d410becccfd9995a8318e329/File/fofimafubepuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=welch+allyn+manual+sphygmomanometerPDF 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_off0000d743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD743 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF55 17876 bytes
SHA-256: 8411ef27a521a7baa65e6f503a1a6cf8035c0e88ee5b84b1a727b30462550725
font_02_sfnt_off00011d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D78 10936 bytes
SHA-256: ac9864c76990b354cc4f86fc6b30dc287c09a415d8939850f0443a73bb886b68

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