Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb68523df4243b3…

MALICIOUS

PDF

321.2 KB Created: 2021-07-26 14:15:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4a56ac71f97e0bee5e52d9b5705445de SHA-1: ee708f2558b63f2ad619dfb1cda8e32371da032a SHA-256: eeb68523df4243b3032711a38b6a1380e9e7d1bb0306b02793565a6e95973580
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous links pointing to compromised WordPress upload storage, suggesting an attempt to host malicious content. The presence of SEO redirector links further indicates a phishing or scam attempt, likely to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9501

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://wilocom.ro/ckfinder/userfiles/files/kunujawe.pdf In PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/9tgk91khtdkhm2bpgf9r8sec27/zijowavuligapivazemo.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3a617e7a8---merixureguvosataje.pdfIn PDF document text
    • http://robbinsfamilyhealthcare.com/clients/2/2c/2c787fa606fc56c3a3a24dfc5409695f/File/doxebulapikep.pdfIn PDF document text
    • http://weddingceremoniesbybev.com/clients/72651/File/74739578305.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608177ca16645---sabebobedefezi.pdfIn PDF document text
    • http://aweibel.com/Photo/file/bisis.pdfIn PDF document text
    • http://slsnn.ru/content/file/fupodofuteronebotu.pdfIn PDF document text
    • http://aardbeienfeesten.nl/uploadimages/files/47823368150.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/kifagumamobup.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/nvh0bs660v6irkj71it6vt4hn5/segimesizakatazizube.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/0104cebe8d095d710bde3fa8ebf5c2b8/28619671945.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160784f005c9c8---82204755490.pdfIn PDF document text
    • https://red-adlay.com/upload/files/93970036201.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a58a08895fd---52105146028.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607331fd5b9f0---85423355222.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eaa45e5544---78440238392.pdfIn PDF document text
    • https://alate.org/admin/fckeditor/editorfile/63098046896.pdfIn PDF document text
    • http://scmsalliance.com/clients/864514/File/33583231892.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=1991+ford+ranger+repair+manual+pdfPDF 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_off00049622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49622 10796 bytes
SHA-256: 62e3132ccdfbb020a0f23bb3c7480a2f493da5024e9e4bf348d3d7c5641aaeb6
font_01_sfnt_off0004aeb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AEB8 18012 bytes
SHA-256: 30bb6aa4d28cf4538537fc9d9b662f44a95ae5e0d3a5916c5437ac47583482a9
font_02_sfnt_off0004ddd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DDD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1