Malicious PDF — malware analysis report

Static analysis result for SHA-256 e49e46936dfbbf76…

MALICIOUS

PDF

70.3 KB Created: 2021-09-07 20:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6a202f3160a0fa188864bcf384b4d2ee SHA-1: 9626664e78995864c1e6972746567d4671594486 SHA-256: e49e46936dfbbf760b0c6fae16cbfb03f450238662780fa93a68091f0a533a40
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The presence of numerous unknown URLs suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://www.haztartasigepszakuzlet.hu/pics/file/86610677230.pdf In PDF document text
    • https://graveyards-fuj.ae/userfiles/files/kikilojejasefewovemiga.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/xonopevojarejuf.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/gurumizudetivogamiger.pdfIn PDF document text
    • https://beysukonaklari.com/ckfinder/userfiles/files/95015138244.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/telanezajobor.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/33d635bc2c29b00696f68a892fded084/nanetuzibebejibefase.pdfIn PDF document text
    • http://montagnobozzone.it/userfiles/files/42483257721.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/dixunu.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a56bbb28ed---93785983839.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/280342046714.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/5f0b6510766dc6c1c3d6feeeae172720/43204244439.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/3lg9lfs3b3c4k6ql0fuqrab374/29064815643.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/xonejajizufividovaxiw.pdfIn PDF document text
    • http://hoangminhceramics.com/app/webroot/uploads/files/zikepit.pdfIn PDF document text
    • https://777mto.com/contents//files/soxuluxevogogekixedumibej.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613038cf79d5e---43565398436.pdfIn PDF document text
    • http://hmconcretemixingplant.ru/d/files/xotexoxufejovu.pdfIn PDF document text
    • http://studioingtassinari.eu/userfiles/files/gidoturila.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/13837901952.pdfIn PDF document text
    • http://dekoblickfang.de/userfiles/file/kopafe.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/bozolukosigizizomar.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/jp33dmrm1l9qse337m1fg4jlh4/89755102734.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/30596568446.pdfIn PDF document text
    • http://taiwanglassgroup.cn/userfiles/file/nazod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=pancitopenia+pdf+causasPDF 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_off0000b55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB55F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD71 14932 bytes
SHA-256: 5feac4e4901c17a1ebbd26197e7e254346ca8290f84081dcab8950858edbef5a
font_02_sfnt_off0000f35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35C 10568 bytes
SHA-256: fff411097f06948e685fc9b78088198946de6ae1db155640ddff64884e212e97

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