Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a9632c5fd1dd126…

MALICIOUS

PDF

81.4 KB Created: 2021-09-16 23:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: abe98608d801d130a150b1c1ec511dae SHA-1: 7b89fb26c51c970cb433768909e14453b9240cef SHA-256: 2a9632c5fd1dd12672dd78c71360aa5055de426d53e2b59df345dd46dc5d5b5d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://medvor.ru/uplcv?utm_term=a+brief+tour+of+higher+consciousness+pdf PDF link annotation
    • http://jedzenie365.pl/ckfinder/userfiles/files/bulujowime.pdfIn PDF document text
    • http://garmaclima.com/uploads/ckfinder/files/tewimazales.pdfIn PDF document text
    • http://www.sas.edu.mn/ckfinder/userfiles/files/dirimubebumil.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///66972601936.pdfIn PDF document text
    • http://career-id.org/ckfinder/userfiles/files/57036405195.pdfIn PDF document text
    • http://abwlanham.com/uploads/files/lalaguvopexu.pdfIn PDF document text
    • http://smarttechsolutionukltd.com/uploaded_files/userfiles/files/kewateponabez.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///42864783085.pdfIn PDF document text
    • https://debcopharma.com/userfiles/file/93634255830.pdfIn PDF document text
    • http://daisin1977.com/js/upload/files/2571758008.pdfIn PDF document text
    • https://kimcert.com/E/file/mefuparefowedawiw.pdfIn PDF document text
    • https://un7un9b3rl1pa7-99.com/contents/files/93474158466.pdfIn PDF document text
    • https://villadorottya.hu/uploads/frontend/files/78086956125.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139fe1cc427c---pikuxobusugavopofitif.pdfIn PDF document text
    • http://jubileejec.com/userfiles/files/gavajufatexefakimadin.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/91302517112.pdfIn PDF document text
    • https://balmbeach.hometeamcorp.com/images/usr/dupesupe.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/fazokaviwitibatumoxup.pdfIn PDF document text
    • http://nsmpublicschool.org/slbdavbatala/userfiles/file/sutofotadebizuzurejujob.pdfIn PDF document text
    • http://ldksolar-officialliquidation.com/userfiles/files/kakejuxe.pdfIn PDF document text
    • http://soncongnghiepjotun.com/media/ftp/file/metumuvupowebabitusazasav.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/pofegagekipizirip.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/35435586178.pdfIn PDF document text
    • 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_off0000d795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD795 10912 bytes
SHA-256: 4eee25636256d4d187af91c698e37d98259a0f0789f57e3e04ed0064ec1948b7
font_01_sfnt_off0000f063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF063 18296 bytes
SHA-256: d24a87b4ee0e994006560930a29f1558b5bc96db933347e82e8e5ceeef9aee1b
font_02_sfnt_off00011f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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