Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eeda509bac65b89…

MALICIOUS

PDF

75.8 KB Created: 2021-01-08 20:45:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ffa7d1e181e992ef7a1f04f31c81dd5a SHA-1: 8b54bc132723b837bde4ee39ee7d24c87780e471 SHA-256: 2eeda509bac65b892653168429851d99fa0b1b0c1b4722d5c17f8a9ff2281da4
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'projective geometry coxeter pdf', likely to entice users to click on the malicious links.

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
  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ggtraff.ru/123?utm_term=projective+geometry+coxeter+pdf In PDF document text
    • https://cdn.sqhk.co/vefuwebilux/U54hfFG/angry_neighbor_apk_free_download.pdfIn PDF document text
    • https://xowuxuwakewobi.weebly.com/uploads/1/3/4/8/134853014/3597425.pdfIn PDF document text
    • https://cdn.sqhk.co/jajotulix/jrMgiUO/77278063224.pdfIn PDF document text
    • https://lijonalorobu.weebly.com/uploads/1/3/4/3/134340538/80428660a1.pdfIn PDF document text
    • https://jetujipizi.weebly.com/uploads/1/3/0/8/130813705/nakuxafitide.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/fatitadajix.pdfIn PDF document text
    • https://cdn.sqhk.co/guledijuxi/jahjGjj/lipakit.pdfIn PDF document text
    • https://fefaterivigem.weebly.com/uploads/1/3/4/3/134375274/181d2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/sezazilawuvoboginedev.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/mobile_app_icon_illustrator_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/gate_engineering_mathematics_notes_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/catalogo_ikea_2015_scarica.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/telugu_cinema_lo_audio_songs_ing.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/colored_corrugated_plastic_sheets_4x8.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/isi_journal_citation_reports_ranking_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/nudekabevemoramabesozumur.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD77 5044 bytes
SHA-256: 2ccce3a959fef824bf5056d392d25041e7fc8bd2ab57bef72783f04828b12266
font_01_sfnt_off0000eec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC1 11320 bytes
SHA-256: f53ecd43b9e4de55466cdcf1dacd9ab36418ea3b1af88b3d1648dcee8af48484
font_02_sfnt_off0001144c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144C 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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