Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcd8ad76dac6579a…

MALICIOUS

PDF

46.6 KB Created: 2020-11-08 11:10:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 23c1fef4216fce3490e7ce2714ffa1ad SHA-1: 97e08c5b19e7ddbf16d25f37c46c742c811a96fd SHA-256: dcd8ad76dac6579a4fbd5ab8e0e7031503e21b7f467168ed0a7fef45c582e6a5
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://traffking.ru/aws?keyword=the+it+department+is+working+on+it In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369506/normal_5f888236617b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424376/normal_5f9d85c56f101.pdfIn PDF document text
    • https://nikuwexipamojag.weebly.com/uploads/1/3/0/8/130813731/fecb96368.pdfIn PDF document text
    • https://worobewunit.weebly.com/uploads/1/3/1/4/131406731/fagol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f8701fb2772a.pdfIn PDF document text
    • https://bewupoterefi.weebly.com/uploads/1/3/1/3/131380107/gisopinur.pdfIn PDF document text
    • https://fozafilamo.weebly.com/uploads/1/3/4/3/134314768/vadenoja_dumowuderobe_devet_wuturudojum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374002/normal_5f8a62251d96e.pdfIn PDF document text
    • https://bonunobomatujo.weebly.com/uploads/1/3/4/3/134318799/696942.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/ddcad09e-5a18-4588-adc0-0071cf5eb19f/85292554813.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f05eeb4a-bb60-4cb8-8558-d4333c0ad862/63901790925.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/dekawijo.pdfIn PDF document text
    • https://ditabudura.files.wordpress.com/2020/11/physical_education_solved_mcqs.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_off0000776b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x776B 5448 bytes
SHA-256: 78c2e938b30616465d0ff4b8209c84ce6f64f32e65613f469772671f9226c076
font_01_sfnt_off000089d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89D7 10472 bytes
SHA-256: 5681ca9d5a8a13850e4b0c3cf47d1a72ea7b0c5bb24917127a63c31eb54c92e8