Malicious PDF — malware analysis report

Static analysis result for SHA-256 883ab139f6fd1a7f…

MALICIOUS

PDF

72.4 KB Created: 2021-02-15 19:09:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: cffba993a78e912b2e7597f4fc3534a9 SHA-1: 28b79a4d61fe6737b75db0d80600afb08db9c46f SHA-256: 883ab139f6fd1a7fe09cd837eef951f5ae6ac46983e7986d242fb9bf537ec5fc
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://seumenha.ru/wb?keyword=how%20to%20make%20a%20line%20graph%20in%20excel%20with%20a%20lot%20of%20data PDF link annotation
    • http://voicebftyi.com/current_fishing_report_for_lake_cumberland_kyoe2eg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417818/normal_5ff21c3938d17.pdfIn PDF document text
    • http://likelid.xyz/wakerogeragog0qn5s.pdfIn PDF document text
    • https://xiresipi.weebly.com/uploads/1/3/1/1/131164504/delezasuwiwor.pdfIn PDF document text
    • http://dawavuwera.22web.org/adobe_signature_pad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412897/normal_5ffe2c02543f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5fe699852eeb4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468551/normal_60033bab3845b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445880/normal_600f3154306f8.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/tgcggmf/tonije.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvexudid/ie9j0hc/xosojudagogefusebogumar.pdfIn PDF document text
    • http://egosikenclub.com/jan_cartoon_new_episode_20175d3sh.pdfIn PDF document text
    • http://pop-marketplace.ru/20285452451blg4x.pdfIn PDF document text
    • https://cdn.sqhk.co/nesadatifu/haEkpwi/50508151023.pdfIn PDF document text
    • https://cdn.sqhk.co/kuderoxuz/higuqcj/z_tune_body_kit_for_r34_gtr.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_off0000db9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9D 5576 bytes
SHA-256: 247705faed750aa4b439875c9d9190d6ca7da72c078a557adf07cfd6eb949a65
font_01_sfnt_off0000ee7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7E 11156 bytes
SHA-256: 17c74ea9929738542f1cd19cb88e0735720f2bac1dbc84c760a5246372f74700