Malicious PDF — malware analysis report

Static analysis result for SHA-256 216c66e602d41649…

MALICIOUS

PDF

89.1 KB Created: 2021-03-18 23:11:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e92c38eb4eafa163e1e871c9f002cad8 SHA-1: e4056cb53df7ebe2a5a28449be8626376f92695e SHA-256: 216c66e602d416490e78bcf066064df1e44601fa4a60aa670965064a6c45e919
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains multiple embedded URLs and exhibits characteristics of a link farm, suggesting it is designed to redirect users to malicious content. The 'SE_ENABLE_LURE' heuristic indicates the document likely instructs the user to enable macros or editing, a common tactic for malware droppers to bypass security measures and download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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://seumenha.ru/award?keyword=edit+pdf+text+mac+preview PDF link annotation
    • https://cdn.sqhk.co/dikulodut/pifOJic/ixl_answers_4th_grade_math.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/mQwCXRx/kosek.pdfIn PDF document text
    • https://cdn.sqhk.co/gunobawiwax/xhhh6gf/european_ice_hockey_rink_size.pdfIn PDF document text
    • https://cdn.sqhk.co/kajurineg/icejgie/1857711360.pdfIn PDF document text
    • https://cdn.sqhk.co/foxezevewa/gsrqtif/top_road_racing_cars.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/NnVhgic/32967433875.pdfIn PDF document text
    • https://cdn.sqhk.co/guvevifowo/jgdggja/good_riddles_with_tricky_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/vefuwebilux/gibgfig/tuxuzinexodobivizo.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/fojaxexino/nuxejodebuwo.pdfIn PDF document text
    • http://rututovabin.rf.gd/sbi_po_exam_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b573c954-d020-4e63-bb58-c77140af3cd0/brian_tracy_eat_that_frog_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/541ac587-5cce-4923-b2c5-1c5b791bcb4a/gosor.pdfIn PDF document text
    • http://fejusudoboriduf.rf.gd/vugaduvaxirozukumem.pdfIn PDF document text
    • http://nasakitubaribud.rf.gd/espectro_autista_en_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/how_to_draw_easy_faces_for_beginners.pdfIn PDF document text
    • http://ketunetu.rf.gd/visual_bcd_editor_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/948f2295-05be-4974-827a-722bf99ab814/which_battery_maintainer_is_best.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c39d4c6-141d-471e-9750-339352a3d3b6/25236264592.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/xaxan.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/cessna_421_cruise_performance.pdfIn PDF document text
    • http://guxajez.rf.gd/wekozabibotapuridexa.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10980 5268 bytes
SHA-256: 87c6845851aeea6afa35fe9b77241366ac8aa4891b925c828a6ab9a953c63062
font_01_sfnt_off00011b70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B70 10928 bytes
SHA-256: 3d2db9ff2055d9644015bcf8a3a3822589417391e2c5f0aff933d7466517f039
font_02_sfnt_off00014098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14098 16460 bytes
SHA-256: 010b158676234a9d178a21ed7133c158a3f2876a1215a00ff5d747c29f68659d