Malicious PDF — malware analysis report

Static analysis result for SHA-256 3add19a5c843aaab…

MALICIOUS

PDF

41.0 KB Created: 2020-10-04 05:26:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 238f2099b7c4064a2195a9a707c18c8a SHA-1: 2f91a5804d33a4b62dd0f794438cc3ab6e3a82e4 SHA-256: 3add19a5c843aaabfeaa046977cebd51f479e139e6e694a70ab9eb98976dcbcb
184 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.
  • 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://cctraff.ru/strik?keyword=animal+farm+chapter+10+questions+and+answers+pdf In PDF document text
    • http://files.cranespiepantry.com/uploads/1/3/0/9/130969761/bajuxizaro.pdfIn PDF document text
    • http://gepumoli.mcvaymotorsports.com/uploads/1/3/2/8/132815176/separ_nejofuwotu_kemaju.pdfIn PDF document text
    • http://files.funkvolley.com/uploads/1/3/1/3/131381450/zizudokonojupomese.pdfIn PDF document text
    • https://site-1037235.mozfiles.com/files/1037235/99585061190.pdfIn PDF document text
    • https://site-1039421.mozfiles.com/files/1039421/37190018921.pdfIn PDF document text
    • https://site-1037000.mozfiles.com/files/1037000/25628641810.pdfIn PDF document text
    • https://site-1044201.mozfiles.com/files/1044201/vigelavawij.pdfIn PDF document text
    • https://site-1039413.mozfiles.com/files/1039413/jidegixububapapedik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/95a08f52-c3c6-420a-850e-48386dcb58fe/88897278155.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d4d3c2b-d553-41a3-a79d-60f28939b8e5/7920856360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a012cc0-f737-4dab-81d1-51ac36604ca9/69679713057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84c6989c-0013-4ee0-acc8-013b2d3c3208/2555407378.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8a58958-4075-4dc5-ba7a-276c7878db6a/50185800324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57109952-d828-48e6-892d-cf13d47661b2/jibawivolakus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/710f3d78-e69e-45ce-93b9-dd2e3726eb5e/29313580403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35b2bb82-a05d-4d74-85d2-9022a3620ac4/dubevotuvuru.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_off000061af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AF 5796 bytes
SHA-256: 292c01c4299c63ce5693a7fb64c53a88f2fff53d1b85ba875293c3d51294b3bd
font_01_sfnt_off0000754f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x754F 9948 bytes
SHA-256: 534cf30327aae148cd5cd22d36ef332753ff13f92d90bb076a42c7663d8f6d62

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