Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5ee92ae7b29f6c6…

MALICIOUS

PDF

69.6 KB Created: 2021-04-01 01:25:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 741e9c4b433295a245c366a1dc9a64ac SHA-1: 43b0fc2af1b2665c933521d4edf032c49fb4fa00 SHA-256: e5ee92ae7b29f6c630222f6b8f3d6f9ea0a094284a95ef062e9f7d0cadb4dcf2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though partially corrupted, suggests a lure related to 'cocktail recipes' to entice users. The presence of numerous external URLs, including one identified as a link farm on disposable hosting, strongly suggests the document is designed to redirect users to malicious sites for phishing or malware delivery. No scripts were extracted, but the PDF structure and embedded URLs are sufficient indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/123?utm_term=all+cocktail+recipes+pdf PDF link annotation
    • http://gatorama.site/pexezapizuke4ic9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423453/normal_60464b4c971ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457302/normal_604d2dba2022e.pdfIn PDF document text
    • https://cdn.sqhk.co/pidagasew/jbBTjdC/59177741162.pdfIn PDF document text
    • http://xazapefunel.getenjoyment.net/basic_concepts_of_topology.pdfIn PDF document text
    • http://digitalmedialit.com/farsi_language_course49t54.pdfIn PDF document text
    • https://cdn.sqhk.co/dirajafowevo/ijPhj9K/god_of_war_gameplay_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/gizukakom/iahfOjj/69167161800.pdfIn PDF document text
    • https://cdn.sqhk.co/gidowoji/efhjlav/10577217250.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455881/normal_5feb503484089.pdfIn PDF document text
    • https://cdn.sqhk.co/perikowep/xfia0jf/81565836720.pdfIn PDF document text
    • http://rrrrkkkkk.space/letter_writing_format_for_school_principalhomdw.pdfIn PDF document text
    • http://weinmvc.net/scratch_pacman_tutoriale8eag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392237/normal_5ff86a704807a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/40367700294.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/batman_arkham_knight_game_guide_walkthrough.pdfIn PDF document text
    • http://tajiroxajesolut.atwebpages.com/39676221024.pdfIn PDF document text
    • http://bepolujogox.atwebpages.com/didojopilisa.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/maxagute.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23E 5200 bytes
SHA-256: 81bcbf725459e5065d3f1d336e66042beee3e543d004748399841c1108d19bdd
font_01_sfnt_off0000e400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE400 11096 bytes
SHA-256: c708d3bbcc633008e31802d3bae4446aa490302fbbb6c49e1bfd044184a3ed0d

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