Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e42e041c24afc19…

MALICIOUS

PDF

72.8 KB Created: 2020-10-30 16:45:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 23ecc22daad5a02611fc70f0a464c6dd SHA-1: 3cb6df2b9ba4c9d5771d1319ee470ef5d5c0dd0b SHA-256: 1e42e041c24afc19298753502ea0f7853b1e21f4a531748d1f1ea854b513b68d
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://cctraff.ru/strik?keyword=skyrim+khajiit+followers+list In PDF document text
    • https://debekekuwafa.weebly.com/uploads/1/3/4/4/134473288/1566986.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/8a740c.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/jukoxisojow/71500083251.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/math_and_statistics_for_data_science.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/22282069873.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9888/9635/files/56724456319.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9937/6802/files/manualidades_para_navidad_con_papel_periodico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2707/0104/files/9604495470.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8486/6217/files/parallel_and_perpendicular_lines_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/16568257352.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/frozen_shoulder_rehab_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/1461/6752/files/lets_learn_japanese_basic.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/kegelawipokinofibar.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/35473604166.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_off0000d11a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD11A 5128 bytes
SHA-256: bea462e564bc5122ca562738ea97d16286fed70ca15b545b9500297f9ba9f10f
font_01_sfnt_off0000e294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE294 10996 bytes
SHA-256: dde0e6a7d1d002af26bc23f7b72b7512557cb0e771b5476104fd59f2c941d10d
font_02_sfnt_off000107ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CE 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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