Malicious PDF — malware analysis report

Static analysis result for SHA-256 9802f37fd67e763d…

MALICIOUS

PDF

66.2 KB Created: 2021-02-27 18:19:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: d0f215b08e69f0d968217b064e098a6c SHA-1: 221929e77bdddc9eadbf5cbe46ab059a445664e3 SHA-256: 9802f37fd67e763d3dc24d1d9e929ce997246fdf216f26c8f9b2c42eaf23a2cf
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, with one prominent URL being https://nipisod.ru/123?utm_term=d%2526d+classes+3.5e. This suggests an attempt to direct users to potentially malicious or deceptive websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

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
  • 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.
  • 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/123?utm_term=d%2526d+classes+3.5e PDF link annotation
    • http://pigigozoruda.mypressonline.com/ryobi_10-inch_15_amp_table_saw_with_rolling_stand.pdfIn PDF document text
    • http://wivuperafuzo.mypressonline.com/69607290371.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/ejdhbgi/69520680866.pdfIn PDF document text
    • https://tobadagagu.weebly.com/uploads/1/3/4/7/134750152/6122792.pdfIn PDF document text
    • http://punejew.mygamesonline.org/vaxibobele.pdfIn PDF document text
    • https://cdn.sqhk.co/duloputemab/Kjg3oia/neon_pokemon_wallpaper_hd.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/what_month_do_you_harvest_beets.pdfIn PDF document text
    • https://cdn.sqhk.co/raserijene/jbjaihh/crash_arena_turbo_stars_apk_mod.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/nagev/97373927316.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/hindu_arabic_worksheet_for_grade_3.pdfIn PDF document text
    • http://desejole.myartsonline.com/kodavavimifubuso.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/leatherstocking_guide_service.pdfIn PDF document text
    • http://nuluwajewugutik.onlinewebshop.net/tissot_touch_solar_titanium_sapphire_crystal.pdfIn PDF document text
    • http://tikomiwewo.atwebpages.com/boxewopanaj.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/budejawujopakotinirov.pdfIn PDF document text
    • http://kipejefanowisu.atwebpages.com/34225134379.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_off0000cabb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCABB 4156 bytes
SHA-256: 58eabb24298f18ab3cb5c3f3a5652a185830994b36fd37cd9ad46fcf77495092
font_01_sfnt_off0000d8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EA 10344 bytes
SHA-256: 5fd62ea03eb3edf31c303c553c11d5ea05bfe6b0c79ef8fa22c712e23128e424

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