Malicious PDF — malware analysis report

Static analysis result for SHA-256 96206b879d9aaab0…

MALICIOUS

PDF

91.4 KB Created: 2021-07-07 00:24:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0abe728d8b93cc0681cdc4f6014711d5 SHA-1: f95adb89369330b185bb69dd638f3984086d5253 SHA-256: 96206b879d9aaab0677e7d5f88aba362d80a1938d18e828d73aa45885bb30501
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to domains identified as compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The embedded URLs suggest a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://saatgaamkansarasamaj.com/admin/uploads/files/89945149198.pdf
    • http://curry-box-deluxe.de/userfiles/file/20504537798.pdf
    • http://softwarefactory.nl/images/file/juloko.pdf
    • http://omonetach.pl/foto/ilustracje/file/59655226550.pdf
    • http://burelomdo.com/ckfinder/userfiles/files/jidafirire.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/91509eb651f8833ea20ec85a788d4c71/55291954936.pdf
    • http://oasis-inwaste.asia/files/file/berogukugojekoxenoposopek.pdf
    • http://nktrading.qa/file/files/nukopuwaminuv.pdf
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/66e8f4a998a4d6d94f5d95658f9e1c97/4653941819.pdf
    • http://mospolytech.ru/storage//files/zumezudepevi.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607d1dee2d4db---wufodo.pdf
    • https://cargotavio.ru/files/file/75067986830.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/90997408386cb396c52061859f335d32/25759638213.pdf
    • http://jrmhandling.nl/upload/file/juxumutifubilugok.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2580e4ccd6db7a4942edfcfb5ae715c2/xidekamojodopogejereka.pdf
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/afc195c8d39ee4cfdd397bb27c72ba1c/53374003596.pdf
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/80bcb5a9f96d1e33ddfa7f3f9a9a8da3/vugibapajur.pdf
    • http://monkey-do.net/userfiles/file/jokitifa.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8f0852d92---pipogol.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16075ca95debe4---94882063706.pdf
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/516491addd2452e49088bd96bdf010a3/4204881801.pdf
    • http://huiking.cn/uploads/file/192034056359.pdf
    • http://fresh-j.info/images/uploadedimages/file/nitifaxufi.pdf
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/werufelelop.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=legal+notice+for+cheque+bounce+format+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x100C5 16792 bytes
font_01_sfnt_off000118dc.bin
f751ae547215a650600a6fd41ab4f989e4640fd4974a709a913764561c2edc4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x118DC 11240 bytes
font_02_sfnt_off00013231.bin
d59f1a2dcc1b97b35bc3f30dea510f023839088dd5d4ef9a16b4579bd9860e17
pdf-font-stream PDF embedded font (sfnt) at offset 0x13231 17476 bytes