Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f9fe5553b3d08dd…

MALICIOUS

PDF

107.8 KB Created: 2021-09-20 14:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c6bd47f768441e7f0218fab242a4108c SHA-1: e69cdfbdda666a7dd3489a7bf86b2ef55bda49df SHA-256: 9f9fe5553b3d08dd7d00532c041c575033251cb0febfa011f116b16298f19171
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, and one specific URL is identified as a link farm. The document body is unreadable, but the heuristics suggest a phishing or SEO-based attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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
  • 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://yoron.net/up/files/ramezudiwanurokatexoxe.pdf In PDF document text
    • http://vasekurzy.cz/userfiles/file/fezomuwapisovarope.pdfIn PDF document text
    • http://maschimaurizio.it/userfiles/files/vipamamogifakupufejexi.pdfIn PDF document text
    • http://poultech.net/d/files/bexeb.pdfIn PDF document text
    • http://euskararenginkana.eus/files/galeria/files/zejidamololaru.pdfIn PDF document text
    • http://baltic-rt.ru/ckfinder/userfiles/files/67818380793.pdfIn PDF document text
    • http://jujucuisine.com/userfiles/file/90220708514.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/timumeremivule.pdfIn PDF document text
    • http://trineckevzdelavani.cz/webpagebuilder/ckfinder/userfiles/files/98169617398.pdfIn PDF document text
    • http://kaiyudachem.com/filespath/files/20210911055004.pdfIn PDF document text
    • http://basaritarim.net/admin/editor_resim/file/zejusanodize.pdfIn PDF document text
    • http://rhondachem.com/d/files/zaref.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/16132a5288c66e---79442587851.pdfIn PDF document text
    • https://bodymart.in/ckfinder/userfiles/files/gizesifemuzewagoposovige.pdfIn PDF document text
    • http://studio-rivetti.it/userfiles/files/lufuxugilelulagereropoda.pdfIn PDF document text
    • http://dailythang.com/userfiles/files/49832535433.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/90280529622.pdfIn PDF document text
    • https://wroclaw-effatha.pl/grafiki/file/41293619147.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/26161548223.pdfIn PDF document text
    • http://tries.cz/media/images/upload/file/moxaniwadikikizu.pdfIn PDF document text
    • http://synergytaekwondo.com/click2buy_newp/userfiles/file/serawezarutufatobag.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613176ac2ec68---fifajaginoroboneporaf.pdfIn PDF document text
    • http://beautifulmoda.com/userfiles/files/tojebenumudivonalexuliko.pdfIn PDF document text
    • https://www.hippocratio.gr/ckfinder/userfiles/files/vodotaxatifimovi.pdfIn PDF document text
    • https://sma-dfgg.org/site/admin/file/vixim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=best+online+platform+for+certificationPDF 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_off00014165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14165 18028 bytes
SHA-256: b7a2f1b0b758daeb46d9ba9cc3774e8221206d4fe3d4e81e527c748b649a7ebc
font_01_sfnt_off0001707c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1707C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18893 10696 bytes
SHA-256: a420e3527b40e8c5d4d6417de10b1931ed2fe35799c2a040516e5b0ff0b80952

Open this report in the interactive analyzer, or submit your own file for analysis.