Malicious PDF — malware analysis report

Static analysis result for SHA-256 dba040e027a9450b…

MALICIOUS

PDF

197.2 KB Created: 2021-08-19 15:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3aad488c8a440ceafa9627aac002decf SHA-1: b62e07e4e413aaecc9c32aee54bd52a9acad619c SHA-256: dba040e027a9450bfd0015547bb504c90867229bf2c6f02a94acedd57ca359a2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to host and distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous suspicious URLs points to a phishing or credential harvesting attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9875

Heuristics 5

  • 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.
  • 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://preserveproperties.com/userfiles/files/fakib.pdf In PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/xilarixiwikitafobudobamav.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/rexafosasuvozod.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/78142895486.pdfIn PDF document text
    • https://xn--lenachatka-57b.pl/uploaded/file/mukepuwexikipuduzow.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/24550546478.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160b200df2c8c0---9034271267.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1974a6fbb---wusodolazigeluxo.pdfIn PDF document text
    • http://studioindelicato.com/userfiles/files/kiwatuzugavo.pdfIn PDF document text
    • https://menu2uplus.com/images/file/kakipajarotafamawam.pdfIn PDF document text
    • https://confidence-ist.com/ckfinder/userfiles/files/66670745130.pdfIn PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/limorixawinaxedexivip.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/63449331494.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/89be2dec3e1cf68d65e0bbab80171ae4/63761333466.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/96476871026.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7b277b5fc---gamipanaf.pdfIn PDF document text
    • http://millecolori.it/images/file/80637253799.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c0880b61f2e---xepipisavanemivusoriwat.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/baa8b4566964951934a34d041a914e56/5120004468.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/35361994081.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609477e3cd3fd---soxojotuwadololoxugodalom.pdfIn PDF document text
    • https://efnnma.org/files/file/nibunolisanivaxorepugizu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=mtg+best+plains+deck+builder+appPDF 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_off0002a2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A2DD 10896 bytes
SHA-256: dd583967d0cf7e1c22ae46e95d219a40e2faf482e83254727a3f21f13ee80b2b
font_01_sfnt_off0002bbc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BBC0 19332 bytes
SHA-256: 0a07815f268eba5d99b245164492188438bf60f2f9ac7697871dc3aaf9824fd7
font_02_sfnt_off0002ee83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE83 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1