Malicious PDF — malware analysis report

Static analysis result for SHA-256 293d8d8a77fd59aa…

MALICIOUS

PDF

83.5 KB Created: 2021-09-11 07:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 13dd5146b3cd3ff4a811cce72e46bfe4 SHA-1: a9ec3c63907011301770a7ab2d4c5fdeb7ee73a2 SHA-256: 293d8d8a77fd59aa908fc83b88fb9a5598eb7cb913c619e61f54e84a481d4955
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to potentially malicious domains, suggesting an attempt to redirect users to phishing or malware-hosting sites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate structure designed to obscure the true destination through a large number of links on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://bhsbeacon.com/FCKeditor/file/faleniludez.pdf In PDF document text
    • https://georeno.ca/userfiles/files/medusewelawaw.pdfIn PDF document text
    • http://ky-auto.com/uploadfile/files/88169325184.pdfIn PDF document text
    • http://ecme.site/2015/vat/upload/files/worizuxijametelej.pdfIn PDF document text
    • http://architettomontanino.eu/userfiles/files/gafij.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/34684174253.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/liwopezozi.pdfIn PDF document text
    • https://sunridgecorp.com/uploads/files/202109052250465122.pdfIn PDF document text
    • http://thestarbusan.com/FileData/ckfinder/files/20210908_BAB6A64126C95424.pdfIn PDF document text
    • http://abbeytraining.net/userfiles/file/febopuvexelalijivopulik.pdfIn PDF document text
    • http://xn----7sbev0bhje.xn--p1ai/images/news/file/jowikunepipoxotopanijeder.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/31227389704.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c19ce2397a---17219829974.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf9f1d8770---52816228012.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/sobuvilojuxarigove.pdfIn PDF document text
    • http://stroytehcentr.ru/images/file/senigawexuxabaga.pdfIn PDF document text
    • http://studioguidobarbieri.it/userfiles/files/bakutijijomofefokipot.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/54188400205.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/mowexomadipukudakokeju.pdfIn PDF document text
    • https://daynexweb.com/upload/ckfinder/files/100577899.pdfIn PDF document text
    • https://aqua2go.pl/galeria/file/bibam.pdfIn PDF document text
    • http://thy-environment.com/userfiles/files/kejulofexanemoweb.pdfIn PDF document text
    • http://sujitonweb.com/userfiles/files/mosujavanibapagolori.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/paburaruviw.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/81607921045.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=fts+2020+free+downloadPDF 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_off0000e1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F3 17792 bytes
SHA-256: ed39c62398f3b23981f645119a7caab0c401e8b8f5a790cae70510b1dc6e68f5
font_01_sfnt_off00010fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000127f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127F4 10560 bytes
SHA-256: 9cac4055ede2dda480ba11938193b0ab74e7cc32c2d33bfd6139b4e867d09ace