Malicious PDF — malware analysis report

Static analysis result for SHA-256 717c442863cef482…

MALICIOUS

PDF

107.2 KB Created: 2021-08-18 19:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8cfea45ebb1c5f9d736981a50c6c7d3b SHA-1: bd9bc110e67c614f998391382cfa7447ee2dc1ea SHA-256: 717c442863cef4824e6546b68c242ee3d9deea25315ff2bd3e18e893ab782a60
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised websites and disposable hosting domains, likely for phishing or malware distribution. The embedded URLs and the structure of the PDF suggest an attempt to exploit user trust through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://infrive.ru/uplcv?utm_term=how+high+did+the+spirit+of+st+louis+fly PDF link annotation
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/a6212d563340feb0764e11c83c5495f0/lotupapadenajejifikevedar.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/41945548835.pdfIn PDF document text
    • http://churchillreunion.com/clients/72216/File/jafotatokitepimibiveli.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0ff8272df---lamumepidu.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089c7c3283db---vepitolatuki.pdfIn PDF document text
    • http://uat2.hkha.com.hk/ckfinder/userfiles/files/98432041033.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/87612292040.pdfIn PDF document text
    • https://datajournonepal.org/files/gemutajesumurakifiluwaz.pdfIn PDF document text
    • http://onlinepravenconsultant.com/uploads/wysiwyg/files/13781661581.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/53736315743.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074585805b34---kudavabazugevakibe.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/88a3d586273d2e4c431a16b699b5e2ba/suketex.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/73454399467.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/zojaluvobovovizegupofuza.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b1bc70ea6ef---mepefemojivowatobosogulak.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a073cc4d352---murivudokegelu.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/c20b233b11f2c2cffb49ed8dbbe3f6ac/69096533779.pdfIn PDF document text
    • http://ruresept.ru/files/file/85507818189.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/mah4u78u3p8bjk0lv5o9ql0cn0/sunatirakugemebikefewojop.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160aaea52802b3---wuniruwurafunewapisoma.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa578216ce---nubitavalupofosuletadi.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ebf0b3300---11313559253.pdfIn PDF document text
    • http://fsgzb.com/upfolder/e/files/20210814230246.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/728c067a275fb9608d8be4a5e62f7404/zarazoros.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_off00013e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001567f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1567F 10804 bytes
SHA-256: 00c1f7f44e728f2b701bf7d57b2ae14bf1e315d790563c4f100851f3f88f5ce3
font_02_sfnt_off00016f58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F58 18304 bytes
SHA-256: 2066a11c005a4ca92bb0b43a0bcf33ad6e08416074e14340109eea9258e322e6

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