Malicious PDF — malware analysis report

Static analysis result for SHA-256 8307b1c9d4d38771…

MALICIOUS

PDF

41.0 KB Created: 2020-10-05 07:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a6b5dc1e69cad61627913da612a2729e SHA-1: e0e3f970d7713d5df4cf42571627286b763cbafa SHA-256: 8307b1c9d4d387711b3f2294c257250f3c3efd47d26a4041ce71b87565888e9c
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://cctraff.ru/strik?keyword=psychology+from+inquiry+to+understanding+3rd+edition In PDF document text
    • https://site-1042843.mozfiles.com/files/1042843/18260870875.pdfIn PDF document text
    • https://site-1036637.mozfiles.com/files/1036637/98185426984.pdfIn PDF document text
    • https://site-1037163.mozfiles.com/files/1037163/ritevizudotogonaguki.pdfIn PDF document text
    • https://site-1036909.mozfiles.com/files/1036909/degakudubuxagajaluk.pdfIn PDF document text
    • https://site-1036772.mozfiles.com/files/1036772/78928467331.pdfIn PDF document text
    • https://site-1036995.mozfiles.com/files/1036995/14013807309.pdfIn PDF document text
    • https://site-1039278.mozfiles.com/files/1039278/75341308449.pdfIn PDF document text
    • https://site-1040171.mozfiles.com/files/1040171/68767605853.pdfIn PDF document text
    • https://site-1036681.mozfiles.com/files/1036681/tiwesilufodolak.pdfIn PDF document text
    • https://site-1036819.mozfiles.com/files/1036819/pabufawij.pdfIn PDF document text
    • http://files.edouardmachery.com/uploads/1/3/2/6/132681976/wogozefudawikimu.pdfIn PDF document text
    • http://sisunepup.middlelanefarm.com/uploads/1/3/1/3/131380828/mutujiparagedo.pdfIn PDF document text
    • http://files.smoljenovic.com/uploads/1/3/0/9/130968926/067ac71c4644fe.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/be6ecb0a-f4fb-48c5-9e6a-3564e3a3be47/lebimesumazexepebujo.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_off00006114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6114 5828 bytes
SHA-256: bec35c071e15fd346d3c44700335294ad23ac102dd2e3226fbc0377bdd70c909
font_01_sfnt_off000074c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74C2 9960 bytes
SHA-256: 08a14fa627412a106d72d0cb4865a7b0c215173fadf092d00db00e4b72aa58d6

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