Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cad51f2118795ab…

MALICIOUS

PDF

74.0 KB Created: 2021-08-25 01:07:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 92abdf4492780e82f8b3c7c860706c77 SHA-1: a3b7df40cec944fcf015f20eeba3f9b909519a10 SHA-256: 8cad51f2118795abdf15ec57327518c2c26ec7c3d916efb01924ac3bcad78562
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9355

Heuristics 5

  • 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
  • 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://drafthe.ru/uplcv?utm_term=operations+management+by+jay+heizer+and+barry+render+11th+edition+pdf PDF link annotation
    • http://adance0112.com/upfile/editor/file/leduwabin.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/j5irktroo3vmu0be3re74e1in3/gezipoxufuma.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/755fba852398099d89e718e9d2b4ecdb/wamabiveni.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087fd6d90a60---tuxoxewideworuzetilip.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/tujodaf.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608a73625332a---7235913737.pdfIn PDF document text
    • http://wallacewilliamsfamilyreunion.net/clients/6/66/662ca4338cd1fa41fa93b88222973dc6/File/7115421150.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a9a887e72---14083850001.pdfIn PDF document text
    • http://shopcloud.cloud//ckfinder/userfiles/files/12231225015.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709cfe34932---wikakabevirosidusesog.pdfIn PDF document text
    • http://sangtaoad.com/uploads/userfiles/file/51594075317.pdfIn PDF document text
    • http://dreambeauty.kr/upload/fckeditor/file/tiwazevosini.pdfIn PDF document text
    • https://monyetjoget.com/contents/files/nasinadodudu.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ca148045f0---73154222842.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/eeb8fbb294493872d39566ce6845643c/zutopejutawukotonibazu.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/sunokititozamosalifon.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/vasuxilerawus.pdfIn PDF document text
    • http://thietbimaugiao.vn/Images_upload/files/juwuxakepa.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/rikesesetitavugorepefod.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/dujuvuz.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/e5da415e5e63f009ec937812d8ec1ad2/xojumobukozuxajamevu.pdfIn PDF document text
    • http://aias.pnu.ac.th/ckfinder/userfiles/files/patuxonodukopoxodepipa.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/64786297936.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/kiwerudidepuluxokazato.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/58338787835.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE977 11420 bytes
SHA-256: 7994fb4bedd3221aa9d720d13361318afdfe8565b8918d91c97c06d8eb57c9c6

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