Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd14407eac9e35b…

MALICIOUS

PDF

78.8 KB Created: 2021-09-08 04:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d47eeafba1b0761e007945a0fa3fe056 SHA-1: 25448474cf770883e48e4878c020890385950537 SHA-256: bbd14407eac9e35baba1010df9a7da7d7ffb293e055f9578ba93c8bef4ae7ceb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, indicating a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160fbd998aa7c7---pexeripivog.pdf In PDF document text
    • https://actorconseil.com/files/file/legoxid.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/16137f0f79892a---jadexunukizuwojogo.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/58291795466.pdfIn PDF document text
    • https://www.sistemkabin.com/ckfinder/userfiles/files/12344698799.pdfIn PDF document text
    • http://chinhsuasolieu.com/media/files/dumetu.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/349e0is9pm1p27q8a4esshn5g8/barofozevokawufefez.pdfIn PDF document text
    • https://inprovituruguay.com/ckfinder/userfiles/files/43537494821.pdfIn PDF document text
    • https://lexcochoralsoc.org/demo/lccs/beta/userfiles/files/ronusepadasifagokesolavej.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/34cdd9d9d8d93507745474b46d90cf64/nedudo.pdfIn PDF document text
    • https://www.theknowledgeonline.com/files/lib/ckfinder/userfiles/files/genelowisejujowuv.pdfIn PDF document text
    • http://kaztelcom.kz/ckfinder/userfiles/files/37961030851.pdfIn PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/limeritunizadazugezesu.pdfIn PDF document text
    • http://calzaturificiocatia.it/userfiles/files/77766876519.pdfIn PDF document text
    • http://worldnaturalfood.com/image/upload/File/84104091187.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/genapabiwo.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/toxonidokagufibinura.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/ubpi3gsq1o61fo5349amokn8a6/31390368737.pdfIn PDF document text
    • https://vietspices.asia/uploads/files/73279480075.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/4b85cd8f18f91a5f5730a034f56a4c92/33559636674.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/ai5rg2vkaugifq5h6cj4ku7vt4/22361809308.pdfIn PDF document text
    • http://rehahomecare.com/upload/editor/files/71793960941.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/qsc2k624smid89urje64sv8r4i/91761250610.pdfIn PDF document text
    • http://trubaopt.ru/content/file/radisabi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=demonstrative+pronouns+worksheets+3rd+gradePDF 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_off0000cd28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD28 17908 bytes
SHA-256: 5ecd16bd7dca93ebb12e92543bfd6ca7e741206ab24ae0a4d717b4be6472c760
font_01_sfnt_off0000fb49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11360 11308 bytes
SHA-256: 8f9d55c898daaceb2cf4bf3bfbf2c5d1827cf66119c6d5a4132e9aa2324b3be1

Open this report in the interactive analyzer, or submit your own file for analysis.