Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c47eca50cccc292…

MALICIOUS

PDF

85.2 KB Created: 2021-06-29 08:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a89fd70dbe41d3ece7370e0d9343c16f SHA-1: 490b77d3c50d6562ccf459098aa219a19a1f4dd4 SHA-256: 9c47eca50cccc292bbf9d369842a267a55f67412aab11138d60e7088e320b83f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to a phishing campaign leveraging a link farm to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://lukasikgroup.pl/Image/files/99847064117.pdf In PDF document text
    • https://advik.net/userfiles/file/97477476451.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/zolikedil.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714eeb8869d---44024543858.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/89541324423.pdfIn PDF document text
    • https://fenicia.uy/fenicia.com.uy/uploads/files/61988474111.pdfIn PDF document text
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/89222388419.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608de5f9817a4---meremoxatugarif.pdfIn PDF document text
    • https://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/45ff5dd4bc8296c1a31fc13553f02204/34093285167.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d863819a0b---75797255890.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/ke6avn8g6f9nn97gs5pukho7j0/winasamiv.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210610124443.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/14906728377.pdfIn PDF document text
    • http://alltechsro.cz/files/82206197316.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/ba7082bd8795179170b96b5ca52d02f0/84848161723.pdfIn PDF document text
    • http://scuderia512.com/js/upload/files/33478487804.pdfIn PDF document text
    • http://annandale1963.com/clients/69704/File/sofewazevamije.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/0acb2f6e402aa6b156655df0e72787bb/65315453069.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/sirovitejeni.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/5b64a6f4b7d852b501d9da6545e3d653/dasudewakonogupuwo.pdfIn PDF document text
    • http://tablica-nieruchomosci.pl/uploades/fckeditorfile/lejixodufepew.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/75485041552.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/wuvebe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=langley+glass+blowingPDF 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_off0000eafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFE 17164 bytes
SHA-256: 514242218f265d610ecacdb43fd162bb1b066adbbc563945c9981e562f745784
font_01_sfnt_off000117ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117EF 10384 bytes
SHA-256: 65e97c151c87a33b8b1a8e81c3ef1b416e5cd2b020a4a7ab72b3cc0cc2e90378
font_02_sfnt_off00012f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1