Malicious PDF — malware analysis report

Static analysis result for SHA-256 87494e07f69e454c…

MALICIOUS

PDF

76.2 KB Created: 2021-01-19 11:54:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9de97f5692741b684b4d7b92f8a80bd0 SHA-1: c81102816924d05b6d715d7e8ae9991bf0a019ce SHA-256: 87494e07f69e454c86d36454faa213a41e6635eaa1bd43b5e10358a86a2862b8
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://jacksth.ru/wb?keyword=name%20generator%205ed PDF link annotation
    • https://xikewewojan.weebly.com/uploads/1/3/4/0/134095915/2375669.pdfIn PDF document text
    • https://site-1199794.mozfiles.com/files/1199794/85634974670.pdfIn PDF document text
    • https://tulorikuxefuwi.weebly.com/uploads/1/3/4/7/134730127/lezerivaze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374373/normal_5fa5158bc0f0f.pdfIn PDF document text
    • https://fitulepam.weebly.com/uploads/1/3/0/8/130874207/22dce22a853f0d.pdfIn PDF document text
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/37bb3335802261.pdfIn PDF document text
    • https://site-1237297.mozfiles.com/files/1237297/aambala_hd_video_songs_tamil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450256/normal_5fb4c1fbd1cbf.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/4188a.pdfIn PDF document text
    • https://site-1234635.mozfiles.com/files/1234635/aviva_pension_fund_performance.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382770/normal_5f90eb10e25ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387242/normal_5f8f762e65dc0.pdfIn PDF document text
    • https://cdn.sqhk.co/lutidofele/jfN7gfv/hero_tycoon_apk_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379723/normal_5fb6ae6bd52f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422893/normal_5fa585bb66892.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ef7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7E 5028 bytes
SHA-256: d1d95e6868245e8db85d23c7006c2ac219448549555d69d62948ac532d88ea0b
font_01_sfnt_off0001008a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008A 10564 bytes
SHA-256: 27407777aaf9f540e9f270a0f94f7332b578923e4cb259e13bb8a3b6d80c9f46