Malicious PDF — malware analysis report

Static analysis result for SHA-256 f98e8163d748d516…

MALICIOUS

PDF

74.3 KB Created: 2021-01-20 12:54:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 92942ed47c4c7bec79f3ed305485edf7 SHA-1: 216888948547d414f3b03173882fc50cbe70bf19 SHA-256: f98e8163d748d5166e4bf0fcd766665c442b3fb3cd50c61f97b3f01e0a0e702f
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://maypoin.ru/aws?utm_term=affidavit+of+support+application+form+i-+134 PDF link annotation
    • https://site-1187487.mozfiles.com/files/1187487/any_desk_p30.pdfIn PDF document text
    • https://site-1174360.mozfiles.com/files/1174360/46253175519.pdfIn PDF document text
    • https://site-1171718.mozfiles.com/files/1171718/atom__io_json_to_csv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401505/normal_5fc89109d3b21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415055/normal_5fd17fd5491dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405687/normal_5fb5c0e7c3f81.pdfIn PDF document text
    • https://josusijino.weebly.com/uploads/1/3/0/7/130739082/nudumokevedotirajo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451929/normal_5fdd9be395cb2.pdfIn PDF document text
    • https://pavofadibap.weebly.com/uploads/1/3/4/3/134370944/nirakavirana.pdfIn PDF document text
    • https://site-1168274.mozfiles.com/files/1168274/87955452754.pdfIn PDF document text
    • https://site-1177116.mozfiles.com/files/1177116/aging_report_template_excel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lusabifef/92995878983.pdfIn PDF document text
    • http://guvamimifufirar.rf.gd/japan_guide_tokyo_side_trips.pdfIn PDF document text
    • http://burijudipo.epizy.com/vuvejaris.pdfIn PDF document text
    • http://voxotili.epizy.com/12049378829.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_off0000e559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE559 5688 bytes
SHA-256: 1625c8e6466e9b27e4d365cd420a2075aac87f49d6ff99b84475c6068806016e
font_01_sfnt_off0000f8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C1 10420 bytes
SHA-256: 569592383f3ce5c7486c3aa7532ed97d48f2718ef7a72d13bad6d0f0b64a3bef