Malicious PDF — malware analysis report

Static analysis result for SHA-256 7874d546037249ff…

MALICIOUS

PDF

98.0 KB Created: 2021-09-02 05:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a8f408a8009fc86eb95fb77d3b640c4f SHA-1: a25150c472f3d84fbab1c343fcc36dc685f9edc4 SHA-256: 7874d546037249ffa47e429e18aed628e9c3a9825030d77ebb76f7f95964d442
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with malicious PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

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 http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/d0gehab3vhgtv5iou5obncq6d5/pomaxugofe.pdf In PDF document text
    • https://myarchitect.es/ckfinder/userfiles/files/10923150051.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/d3204713e43fea203020fcdd7c464598/bexetezug.pdfIn PDF document text
    • http://profitoolinfo.ru/ckfinder/userfiles/files/kuvizajesikipex.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/6158655233.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7a81eef18---92368709416.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607406a45a19f---70525751157.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/lezibatineraze.pdfIn PDF document text
    • http://www.trotasierra.com/plugins/ckfinder/userfiles/files/ritoxomowavov.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kakofu.pdfIn PDF document text
    • http://terhautz.com/upload_files/files/sejirikekevibat.pdfIn PDF document text
    • https://rakowka.pl/userfiles/file/87273348212.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1611b80e16ab82---93806618841.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/luguturapudizasosum.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/b283ad158a863ebde3cd394a7548d574/95938876735.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/49032017670.pdfIn PDF document text
    • http://vuadiemtayninh.com/hinhanh_fckeditor/file/rolagiporufemure.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1610290c7d97ee---pitesutafugikewagubakor.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd803980512---porunuduf.pdfIn PDF document text
    • https://senfina.top/uploads/files/jodazejologuvaro.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/393oiu8l53a3i4li59hc6iraja/12987303567.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/6f65ae0ee2aec2e9da9f2303f87873a3/10339162170.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/96829159804.pdfIn PDF document text
    • http://busanpc1.com/upload/fckeditor/file/87100918466.pdfIn PDF document text
    • http://eichler-kammerer.de/40290990267.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/7e685804fec4fd1a897674b831312eae/vovuwijenonoraj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=indirect+reported+speech+examplesPDF 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_off0001188a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1188A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000130a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A1 10832 bytes
SHA-256: 7ab36e438b2a16ce1c23fa39c03c7e22cfe4e84a0dc0279f673224bcae794cdc
font_02_sfnt_off00014962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14962 18648 bytes
SHA-256: bdc68f9d5385dec731cd1ddd5487bf4c8943a4cb6ca3bfbd35c6c67cd57fd8fe