Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb3e98c485fde175…

MALICIOUS

PDF

72.0 KB Created: 2021-02-10 09:56:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 36191606d215c2f39b7667a449dcc0c2 SHA-1: 5912101c487be51bb1f4625b7933d8be61a6fd62 SHA-256: cb3e98c485fde175501a73d5c9c63cd6d009a8c496c7987848ce2abaa3e7d2ee
184 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable hosting, many of which are SEO-optimized to appear legitimate, suggesting a phishing or malware distribution scheme. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms that at least one URL leads to known malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=coronary+artery+bypass+grafting+pdf In PDF document text
    • https://cdn.sqhk.co/zubixola/hNpggYV/used_cnc_machines_for_sale_by_owner.pdfIn PDF document text
    • http://omynutural.space/house_of_night_destined_free_downloas54ya.pdfIn PDF document text
    • https://cdn.sqhk.co/belebudetub/jha7igd/mijakuteragaralutuneba.pdfIn PDF document text
    • http://airned.ru/tai_ban_ca_68_apkvup15.pdfIn PDF document text
    • https://cdn.sqhk.co/jukowejazus/jqiiGjc/fufibuxigexekejekokabonaf.pdfIn PDF document text
    • http://chambre.xyz/edexcel_igcse_ict_revision_guide7exnn.pdfIn PDF document text
    • https://cdn.sqhk.co/ketusugedi/Egg4Cgg/21276908200.pdfIn PDF document text
    • http://kemytbok.xyz/nojotazlvk02.pdfIn PDF document text
    • https://cdn.sqhk.co/kurazagizub/JjhqFBq/retro_bowl_game.pdfIn PDF document text
    • http://expo-kit.ru/49943321910ung1y.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/icNGQW4/immigration_and_nationality_act_section_212_a_2.pdfIn PDF document text
    • http://keep-travel.com/bipalephfkpv.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/jio_phone_play_store_gamesrx0o3.pdfIn PDF document text
    • http://businessoutsourcing.info/86739487412hb9dc.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/jeijjiC/jetta_convoy_simulator_apk_android_oyun_club.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/jdSsiix/disney_plus_login_limit.pdfIn PDF document text
    • http://myshoes.moscow/195001300506qcdr.pdfIn PDF document text
    • http://leomannapov.com/icarus_s_flight_poem_questions_and_answersfubzz.pdfIn PDF document text
    • http://stalekost.site/computer_network_book_in_hindi_downloademwxi.pdfIn PDF document text
    • http://select-get.top/kadaxonuxawowisuriblt9oa.pdfIn PDF document text
    • http://usmileofficial.site/vsco_apk_full_packjnjzy.pdfIn PDF document text
    • https://cdn.sqhk.co/kizusuvut/dTqrmFy/kinepuzedifa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000de9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9D 5324 bytes
SHA-256: 7bf2ea8d38232b707ab3857af56668e4f76f6ba7ff40cf909505bebccb22fb78
font_01_sfnt_off0000f0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C9 9876 bytes
SHA-256: c167b8ebf1ceb1d32b27d9df8e408db6477ba32ad9e2b82ea8ad786e03f95f9d

Open this report in the interactive analyzer, or submit your own file for analysis.