Malicious PDF — malware analysis report

Static analysis result for SHA-256 a99015680ab8d14e…

MALICIOUS

PDF

71.5 KB Created: 2021-01-17 23:41:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 524b745e055059bffdf00b64058249a5 SHA-1: 82ba34b7462d1adff9e03a450fc72f04c7564e86 SHA-256: a99015680ab8d14e965c36829d8694e72dc229e985fc16e89f3cf2ff65f575fa
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/123?utm_term=can+you+buy+condoms+at+14+in+the+uk In PDF document text
    • http://kadesevi.iblogger.org/28253155873.pdfIn PDF document text
    • https://siwikuzovusodig.weebly.com/uploads/1/3/4/3/134357046/simulimupifuse-govepam-xiwujakefoded.pdfIn PDF document text
    • https://site-1245107.mozfiles.com/files/1245107/grid-_template-_rows_not_working.pdfIn PDF document text
    • https://nujuwededewomoj.weebly.com/uploads/1/3/4/3/134305400/bupopigovutawafan.pdfIn PDF document text
    • https://vetasokimatajed.weebly.com/uploads/1/3/5/2/135296406/gedupez.pdfIn PDF document text
    • https://zowadadevifu.weebly.com/uploads/1/3/4/5/134597758/811e94220.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuluputig.epizy.com/bewukenesexataruzov.pdfIn PDF document text
    • http://kejidexod.epizy.com/16097162961.pdfIn PDF document text
    • https://s3.amazonaws.com/pazaxazusa/73288929661.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/edtpa_task_3_literacy_assessment_commentary_example.pdfIn PDF document text
    • http://nupakavidowux.epizy.com/baripozipejasafavo.pdfIn PDF document text
    • http://kowotasube.epizy.com/ms_biomedical_informatics_salary.pdfIn PDF document text
    • http://kuwoguki.epizy.com/aua_guidelines_bladder_cancer.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_off0000dba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA8 5404 bytes
SHA-256: 0a5f8383db8844abc3e00bfa741cb2d5201fe7727d17caeb6ec0513136d00348
font_01_sfnt_off0000edf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF0 10408 bytes
SHA-256: dfb59b1ffa88563c08dfe97c1402b9aa887379cc4e7fc0912b977d7cc0632bc2