Malicious PDF — malware analysis report

Static analysis result for SHA-256 076e22c923685c1c…

MALICIOUS

PDF

87.3 KB Created: 2021-09-04 00:12:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2e17b3e052a992eace8f263758abb20d SHA-1: de2f7a6ec965964878da976922a93234f239cc4a SHA-256: 076e22c923685c1c1406183dc3c059a4ce597e601507a114de091712c49b4366
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links, many pointing to compromised WordPress sites and other potentially disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to direct users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://rowanfamilyreunion.com/clients/28915/File/tekidotuxagewikalu.pdf In PDF document text
    • http://retrolondontees.com/userfiles/file/99951043165.pdfIn PDF document text
    • http://ledins.lv/cms/file/pogavivikezebudamizen.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/14415211890.pdfIn PDF document text
    • http://gamjagolla.com/uploads/files/dakuvup.pdfIn PDF document text
    • http://upperdublin1970.com/clients/3/3b/3b2fb281f4756d03d37a29c41a8c1d95/File/mezilawe.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/51945307779.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16090d94e819fe---rukezanijetumegovud.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607170dfe5336---bamarefifuf.pdfIn PDF document text
    • http://mamam.by/upload/File/file/30143879253.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/43847309508.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d3a49c18f---fuzugutidunudu.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/levevinulupefabotozex.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/rekidifef.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073365457b3d---fipufexukumenibizulexukug.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210523220845.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/xebosofexusado.pdfIn PDF document text
    • http://sochi-polyana.com/ckfinder/userfiles/files/bufaropebipolovodixidanux.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606e310fd27db---9669912806.pdfIn PDF document text
    • http://choragwica.pl/userfiles/file/kevaluv.pdfIn PDF document text
    • http://mprime.net/ckfinder/userfiles/files/44249811591.pdfIn PDF document text
    • https://drsaman.com/files/90949604794.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/9sfkbi50e8dunfvo58gru5jags/xoger.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161243757bfb92.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/tilaboxemolo.pdfIn PDF document text
    • http://inciboya.com/resimler/site/files/gekov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=beauty+and+the+beast+pdf+piano+sheetPDF 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_off0000ebe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE3 10856 bytes
SHA-256: cc0ba3fb2e73f8157d643aff65992465ef84bb21c9d3cdaa5f7c0d7044e3b851
font_01_sfnt_off000104b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B5 19380 bytes
SHA-256: 6f2b785a187cb3468e4c23f8e9b823c0b75606208a2cc0bccb3cbacf079dd840
font_02_sfnt_off00013785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13785 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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