Malicious PDF — malware analysis report

Static analysis result for SHA-256 198359e2ce2b70dd…

MALICIOUS

PDF

81.4 KB Created: 2021-04-06 20:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 29594f2d43192cd1377fb3a93240b3a1 SHA-1: b7749e3cc2d16407bcf821f25cc7649d919e2d82 SHA-256: 198359e2ce2b70dd2b20272af97e197c3028e9dbe3f2de0afbf24756ca3bd78b
136 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly support its malicious nature. The primary malicious URL identified is https://maypoin.ru/strik?utm_term=best+quote+from+screwtape+letters, which is likely used to deliver a secondary payload or conduct phishing.

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://maypoin.ru/strik?utm_term=best+quote+from+screwtape+letters PDF link annotation
    • http://fesotisifofil.mygamesonline.org/beckmann_rearrangement_download.pdfIn PDF document text
    • http://arfeshome.com/fusolesukumoweok5.pdfIn PDF document text
    • https://cdn.sqhk.co/mopijiluxu/jhjgXhb/lol_diana_guide_s9.pdfIn PDF document text
    • https://cdn.sqhk.co/wegodimumod/hdXjh46/supermarket_mania_journey_unlimited_diamonds.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/cartographic_school_of_criminology.pdfIn PDF document text
    • https://cdn.sqhk.co/balemarize/wChg5ha/16968431707.pdfIn PDF document text
    • http://bbcua.site/erik_satie_gymnopedie_2_piano_sheet_musicmgygd.pdfIn PDF document text
    • http://zitupow.medianewsonline.com/11th_bipartite_settlement_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/pesasotiro/hbDjhij/best_free_movie_sites_south_africa.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimanujage/Siigjig/fruit_kingdom_fukushima.pdfIn PDF document text
    • http://xijipeva.mypressonline.com/36132706819.pdfIn PDF document text
    • http://appless.space/kizewolawodefatalavewrp7k.pdfIn PDF document text
    • http://retys.space/what_is_a_spiritual_blessing1yns6.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/rezugekolaba/burger_king_menu_application.pdfIn PDF document text
    • http://dolanuvusipegu.myartsonline.com/rigalaruvefegedimu.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/arduino_software_free_for_windows.pdfIn PDF document text
    • http://dupepoge.onlinewebshop.net/wunageb.pdfIn PDF document text
    • http://suwuriru.onlinewebshop.net/lawelox.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/bobaw.pdfIn PDF document text
    • http://tobikinos.onlinewebshop.net/spinal_shock_treatment.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/b_tech_computer_science_syllabus_iit.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/tokofunoj.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_off0000ff87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF87 5428 bytes
SHA-256: 5a3e1a83c1875c1261e4700ae3f80e2cc2583ea2b2755d8dbb1e202c4d47b33b
font_01_sfnt_off00011204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11204 10836 bytes
SHA-256: c13975162d263fff12bb3e5de252e8e2430da8c4d69c3f622e8fa2f74c7176f1

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