Malicious PDF — malware analysis report

Static analysis result for SHA-256 73ff320ac301943c…

MALICIOUS

PDF

101.5 KB Created: 2021-09-06 21:54:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fd23652fc7b79ee72cf3c4287262c0bf SHA-1: bb81c973e69e8a600f85912db810a27bad2d047f SHA-256: 73ff320ac301943c37c3d90734cd52d6fcc2d75083731b5b1e8a31156fb14627
124 Risk Score

Malware Insights

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

The PDF file contains a link farm that directs users to multiple external websites, many of which are hosted on compromised CMS upload directories. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely to phish for credentials or lead users to further malicious content. The presence of numerous links, including those on disposable hosting, reinforces the phishing and redirection pattern.

Machine Learning

  • Nyx PDF Classifier clean score 0.2074

Heuristics 5

  • 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
  • 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.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075aea8be78e---19292251336.pdf In PDF document text
    • https://agrilaui.com/userfiles/file/60863922378.pdfIn PDF document text
    • http://2021woods.com/clients/b/b0/b0e6999751250b7f6f06d89f33415bdd/File/foredogeresovelakifu.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/xifiwebamoluxitipag.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/f3t0i9mtch2rtgrhud54mg2eo6/40683577861.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/lisaraliven.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/33916104906.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1611f8281a812e---45307300181.pdfIn PDF document text
    • http://topcudental.com/img/userfiles/files/fonanov.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a57b3d979dc---15001003287.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3305edbc0---93149321098.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/l11inah66lktfla80q9rd3fbt4/turulipemabebuwaz.pdfIn PDF document text
    • http://benevolo.it/userfiles/files/lijili.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/eb1jh9ngch0jnvhg99csdt175v/2050606793.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607393bc4c23e---44366489509.pdfIn PDF document text
    • http://citra.cl/userfiles/file/32878509755.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4683716833---42449021534.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/faa5e935e1a54a79b954b74354f20201/21472766546.pdfIn PDF document text
    • http://desushibar.com/userfiles/file/97781887454.pdfIn PDF document text
    • http://fittbikese.hu/files/file/55118415757.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bbcad3e176a---masaxuwigidejugutep.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/todutawedowig.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a7af44d27---minapugunidevolitopexado.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80335e52e3---70165962734.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=odour+of+chrysanthemums+text+pdfPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/54221121772.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DFE 11088 bytes
SHA-256: 300b159a70cee1a10b560c8638fbba9046e1ac4434731365f967d34de6871cb3
font_01_sfnt_off000177bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1