Malicious PDF — malware analysis report

Static analysis result for SHA-256 787d673bb0669268…

MALICIOUS

PDF

46.3 KB Created: 2020-10-13 17:27:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 474ebb41a3c759d06bcb2d155a4032f0 SHA-1: 13b0923c808897426891347e200eb0d2ea5245df SHA-256: 787d673bb06692681db8b767b6412ea09929fbd57d6893d3079ec8ae86bd5fbb
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ggtraff.ru/strik?keyword=livre+exercices+grammaire+francais+pdf In PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3355978.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/3718456.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/8925184.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/9051060.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/kasodopizafazakoxuk.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/belapigojat.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/7d7b6617ab8.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/wotareropajewub.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/porukofosu.pdfIn PDF document text
    • https://site-1038601.mozfiles.com/files/1038601/mefowutifofumatokod.pdfIn PDF document text
    • https://site-1036951.mozfiles.com/files/1036951/72029545972.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://uploads.strikinglycdn.com/files/31b4a216-bc4b-4abe-a979-9057fe6fbce4/53170891997.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/527c0a31-4403-49aa-b0d4-26f9ade96993/meporumidipemotar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7efcfe7-d196-45a7-aff5-2d6e64c75df0/lupubufonedatadukadikureb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c00b4f7-7597-433a-913f-5c44f146fbe3/5312609222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46a24a8a-8711-46e0-b4fe-b44e3dcf0dbf/nitodozarabutunipikodap.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_off00006418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6418 5108 bytes
SHA-256: 905189f306a0afd7fda8a098b29a93f926d6ed692b312c303851a75dd0744589
font_01_sfnt_off0000755e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x755E 11896 bytes
SHA-256: b76401960987585762524d87c6dd6a5bd8c2df28c2ac7aeb7cd5187696fae246
font_02_sfnt_off00009bb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB1 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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