Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae88f03b481c8ccf…

MALICIOUS

PDF

61.3 KB Created: 2020-11-09 13:01:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 341c64dfdd68619d5af6227414a6e0c6 SHA-1: 148add60cd433ccec87036e05f6d52c2d2219aec SHA-256: ae88f03b481c8ccfbc8e2373d6f62d4094755913072d591c05a9e57ff95403c9
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://traffine.ru/aws?keyword=idle+heroes+monster+guide In PDF document text
    • https://zirufifun.weebly.com/uploads/1/3/0/8/130874679/depuraguvarukug_sitivinagiwun.pdfIn PDF document text
    • https://kisuwirabavaruz.weebly.com/uploads/1/3/3/9/133999170/tebek.pdfIn PDF document text
    • https://telexetobowu.weebly.com/uploads/1/3/4/3/134339901/zepudedukese.pdfIn PDF document text
    • https://xifobosakup.weebly.com/uploads/1/3/2/8/132815359/3796637.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386079/normal_5f91e38c820c9.pdfIn PDF document text
    • https://walasopi.weebly.com/uploads/1/3/4/5/134588780/zovinanotaxaf_vebukegoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403816/normal_5fa3012891e9c.pdfIn PDF document text
    • https://mavegisokelu.weebly.com/uploads/1/3/4/1/134131346/4bd87f.pdfIn PDF document text
    • https://bakukumi.weebly.com/uploads/1/3/4/4/134437371/4351775.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372702/normal_5f8e0596750c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370303/normal_5f8f93bff128a.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/e0530d75-710a-4f98-be84-e1987718066c/69493231697.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000b7ba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB7BA 27324 bytes
SHA-256: 017ac337f780bc9198b8aace5d19def0f9705e57b58b670fa0f7574d6bfe52c9
font_00_sfnt_off00008248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8248 4964 bytes
SHA-256: 69abb62b2a7dcded54cc231c35fb48010cf731e700c7fb98b5c18e21c57fab5a
font_01_sfnt_off000092fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92FC 10720 bytes
SHA-256: dc6ee2f094e35e7c9d7287110999a7f448e75c55791fe5cf13f81132ef65b9da