Malicious PDF — malware analysis report

Static analysis result for SHA-256 bae6e61f88b0ab49…

MALICIOUS

PDF

80.0 KB Created: 2021-09-07 06:07:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a9f7a02fec5533e895166ba43991936b SHA-1: afebf24fcca3bb6022f9bfd786dfe91488fee4e8 SHA-256: bae6e61f88b0ab498409fa94d4d4342b15849827dad13d5b3c84a6e3e7b1e924
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded JavaScript indicates an attempt to execute code within the user's browser or PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 http://helloshoppingnepal.com/userfiles/file/voxikirefobuwigizogigu.pdf In PDF document text
    • http://hoangminhsaigon.vn/@dmin/js/ckfinder/userfiles/files/77151944381.pdfIn PDF document text
    • https://cdmsig1.com/ckfinder/userfiles/files/mixemalawi.pdfIn PDF document text
    • http://webinaris.org/ckfinder/userfiles/publics/files/1510046695.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/mobig.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/53094411283.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829170f2a4a---21241622919.pdfIn PDF document text
    • https://homeuu.biz/upload/ckeditor/pages//files/besosanotuxid.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/nq5mst4kh7m3bomfkec8shrbf2/20090360187.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/32832738133.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/208f7a89e216059d4921e0e8b36508a8/xaxetegikaligem.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/rovobukusafexunusabaleja.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900032a7956---zejodefewekejejof.pdfIn PDF document text
    • https://daiichitravel.com/uploads/news_file/sodugoxezumer.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/34a93640bdb07517b417699bf4fd0c27/4544939190.pdfIn PDF document text
    • http://kingsauto-bar.com/js/upload/files/70745810288.pdfIn PDF document text
    • https://promobryansk.ru/userfiles/files/7875741241.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d933be58ad---xofuvabosuvebunolifenubi.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/97022670643.pdfIn PDF document text
    • https://derfo.info/resimler/files/gevupuditozivaxafezuj.pdfIn PDF document text
    • http://kleinschaden-expert.de/userfiles/file/37702197091.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=solving+proportions+worksheet+algebra+1PDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d10c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD10C 11044 bytes
SHA-256: 2eea51db2050494fd256b274642e77c6c0f9ed9221cc54d1ef3f799e19a12f30
font_01_sfnt_off0000ea91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA91 18368 bytes
SHA-256: ebad2de0f63a28903cdf6a441aaab49193f08e997d1d3f6edd3cd7e3cd52342c
font_02_sfnt_off00011a79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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