Malicious PDF — malware analysis report

Static analysis result for SHA-256 65a250e41c294daa…

MALICIOUS

PDF

82.4 KB Created: 2021-09-09 00:07:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9f481191c3a41d8a9b71fe78f1675d15 SHA-1: 57616f3b67b9800cfc3e40d306740aa704cd0c5e SHA-256: 65a250e41c294daa8b77886d7cf0d530fb42af1782253dc69db84001887eea5f
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lure users to potentially malicious content. ClamAV and ML classifiers strongly indicate malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/9iudg9g5mironulaf9c907v3v0/balatofen.pdf In PDF document text
    • http://macabrey-luthier.fr/data/Files/59126296240.pdfIn PDF document text
    • http://scro.ru/pic/file/degonidunavepilewovoti.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/fuzifoxunolipevusogow.pdfIn PDF document text
    • https://tonere.shop/app/webroot/files/userfiles/files/wijofutojujuwit.pdfIn PDF document text
    • http://www.grupoaccs.net/ckfinder/userfiles/files/vuxuzibosow.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16136847544f5d---pozogufodevesumubudes.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16132ed0fd567d---97851825735.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///95963117224.pdfIn PDF document text
    • http://csc0512.com/userfiles/file/20210907105800_so3g67.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/23398513940.pdfIn PDF document text
    • http://only-svet.ru/upload/files/demizelunamoromopirazok.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/42925021046.pdfIn PDF document text
    • https://gulamanis.com/contents/files/bamuxawuwalef.pdfIn PDF document text
    • https://piti.leaddeehub.com/userfiles/files/62597211095.pdfIn PDF document text
    • http://ristorantebiscione.com/userfiles/files/jebofagivomato.pdfIn PDF document text
    • http://onlinetradeshow.ir/uploads/files/16991074814.pdfIn PDF document text
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/favusawoge.pdfIn PDF document text
    • http://metamorfoza-krosno.pl/userfiles/file/86666487085.pdfIn PDF document text
    • http://le383.com/uploads/files/44412565780.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/76551937a25b0ba40aa72edb5565371d/gikufafomezudo.pdfIn PDF document text
    • http://vietsaovang.com/uploads/userfiles/file/73053414982.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+logout+of+gmail+on+androidPDF 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_off0000ddbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5D3 10576 bytes
SHA-256: ba5d82c4863fc4a1eaf4bbc622e25a646579bc265a6f25b7117021cf173f2e98
font_02_sfnt_off00010daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAF 18164 bytes
SHA-256: d2095706e4b9e87448da490ea64267b1f65d946fd87d7687075f43a779686142