Malicious PDF — malware analysis report

Static analysis result for SHA-256 cabc8471e75d4a4f…

MALICIOUS

PDF

41.2 KB Created: 2020-10-15 19:53:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5d12dbb90bcbd1da6570ce77759e23d9 SHA-1: d4760a9598fc71f7eabc39551dc67defb59c1bff SHA-256: cabc8471e75d4a4f97707dbd2e64fd3f43577117f37c10287e6bef0f9745c753
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=lego+star+wars+buildable+figures+stormtrooper+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f870b5426465.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369182/normal_5f8816979b99c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_5f885c62a11ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f8749feb7fe2.pdfIn PDF document text
    • https://site-1040288.mozfiles.com/files/1040288/todas_las_ramas_de_la_quimica.pdfIn PDF document text
    • https://site-1043882.mozfiles.com/files/1043882/basemirupagepivuraj.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/c56c8fa4a9d62.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/resojubetufekunod.pdfIn PDF document text
    • https://site-1043316.mozfiles.com/files/1043316/negefisavomezo.pdfIn PDF document text
    • https://site-1038526.mozfiles.com/files/1038526/kolesiwufexixaposeduk.pdfIn PDF document text
    • https://site-1039885.mozfiles.com/files/1039885/95439264481.pdfIn PDF document text
    • https://site-1040506.mozfiles.com/files/1040506/92223182561.pdfIn PDF document text
    • https://site-1038561.mozfiles.com/files/1038561/vesunazava.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/7d8fd1c7-68f2-4020-b613-bdb34d5a32f9/saxonoxos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a2f1bb0-1dd5-46c7-870f-5927b8d5880b/gigeseteralakavibadek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2785952f-5452-4363-b2e1-b423c79827c5/kubudipagug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6651f6de-31df-4f08-bb88-8e1138306a3b/1744222632.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_off0000565d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x565D 5648 bytes
SHA-256: 776f346978a4e83c3b0cb46f9dcf0064888d8d34d8138b7aa521699cfbed57f4
font_01_sfnt_off00006991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6991 14440 bytes
SHA-256: 03b7f21bbc3ae673f8693160433a6ea584c4b2243a73ab59d4b08e2328dabcf5

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