Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4759d899bf6defa…

MALICIOUS

PDF

43.1 KB Created: 2020-11-09 01:38:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 5c303d6cf57024607fcbc679b0a7f7cf SHA-1: 8d43e386abf8caca6d0336c3e0af5b6596aced8c SHA-256: a4759d899bf6defa1972fc1b237b0a2812116eda73c788001e21b7035e13ba74
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=investment+spending+economics PDF link annotation
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/jewogovixov.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/xitiruguxanib-korufepo-wesigodu-negaf.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/tezesesinaxi-kakizas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f9d322a90e02.pdfIn PDF document text
    • https://wabebapag.weebly.com/uploads/1/3/4/3/134335427/b37058d6133.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/bekalan.pdfIn PDF document text
    • https://nudopimiga.weebly.com/uploads/1/3/1/0/131070212/toxifimo.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/e3fde47f-bd2c-4e23-950f-da9448aff4f1/14050035645.pdfIn PDF document text
    • https://zisaniv.files.wordpress.com/2020/11/38506493434.pdfIn PDF document text
    • https://lafukoruza.files.wordpress.com/2020/11/cara_flash_hp_oppo_neo_3_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/706ca327-e9ee-414d-83b5-5510c6300da1/zidojufogujubizupuxom.pdfIn PDF document text
    • https://vadazigifexe.files.wordpress.com/2020/11/merozasopegujibe.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_off00006bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BCE 5052 bytes
SHA-256: aea00af360f36a3883974c82499163578d3c9bc79b4300272da12cb558c2e560
font_01_sfnt_off00007cfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFB 10484 bytes
SHA-256: e5e67d66f3b72487add445c70bdeb8874a274150df85e80a2aef164e03c5f3ef

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