Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce010ff138bda6d9…

MALICIOUS

PDF

81.0 KB Created: 2021-03-14 00:11:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9adcc4c6cc6df2e2b820c144c5966e0c SHA-1: ec2b998489075f28508f47c8285d2b25a54dcf5e SHA-256: ce010ff138bda6d96d11511b20a33ff5941c2aedf3e83e84d64fd07497e929bc
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically pointing to 'nipisod.ru' which is flagged as suspicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host many links on disposable hosting, suggesting a phishing or spamming operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/wix?keyword=mahatma+gandhi+leadership+style+pdf PDF link annotation
    • http://makedctl.site/31056873534wbavn.pdfIn PDF document text
    • http://help-feedback-amzn6.xyz/573999663269jrp8.pdfIn PDF document text
    • http://vogatamojaz.22web.org/beninca_brain_24.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/bicChcH/tumirufepubofide.pdfIn PDF document text
    • http://egosikenclub.com/14277634726sohmf.pdfIn PDF document text
    • https://cdn.sqhk.co/podoxato/jgshgje/pomowizelerum.pdfIn PDF document text
    • http://italiahot.space/83165632162u6ryr.pdfIn PDF document text
    • http://cmbmarketing.agency/60237356370ee6mk.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/jeponowon/jemejidegatebumorosotozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72283499-bfa8-4fcf-a428-4cd76d2faf5a/garmin_forerunner_405cx_gps_sport_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/xupimaral/murray_lawn_mower_blades_38_inch.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/rebeposorosorevar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84ecf6d0-e2bd-432d-8267-7bd329474174/jowewurubesupelukubo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65f0b02a-a120-485a-9ccd-dc204a9bc659/koxikuxujosiw.pdfIn PDF document text
    • http://zozefopufudamow.rf.gd/tuxisi.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/casino_party_invitations_templates_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dfb4625-2d47-4b00-ad4e-dcca7a8c0c55/how_google_works_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5be04591-62c1-4126-b668-4568692b0ddd/2008_jeep_wrangler_sahara_unlimited_towing_capacity.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/inductive_and_deductive_arguments.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8cd5435-1664-4e45-b36d-1d658bca6037/pdp_rock_candy_xbox_one_controller_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e5d837c-6847-4131-bc4d-12862a595efa/kwikset_powerbolt_hard_reset.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_off0000fdd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD3 5560 bytes
SHA-256: 91d461b0f3aec3edf7112138a0182eb5810e7c57bd25f6f0bed30eda7c008287
font_01_sfnt_off000110ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110AB 10716 bytes
SHA-256: 9cc3a569daacc2f8fd06f691469ad2f9dab9a4a27b73d3e71fad4789d9ca4149

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