Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d4dea511ac2edac…

MALICIOUS

PDF

63.2 KB Created: 2021-02-15 08:13:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7c03bc03bfc976b59c0b8e47d3ef55fe SHA-1: 567941f1fbc07f81d77ce9db74e61683b43351e4 SHA-256: 8d4dea511ac2edac3ded48df1c7ec4be8c7a86abaff60967cc920cba5d9bcf5d
184 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
  • 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://yafferge.ru/wix?keyword=st+dorothy+church+glendora+ca In PDF document text
    • http://sosyaltakipcipanelin.com/the_universal_traveler5gb99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375356/normal_5ffa34a643ef9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417221/normal_6005f70e76143.pdfIn PDF document text
    • https://cdn.sqhk.co/verexumifo/bqham7v/gered.pdfIn PDF document text
    • http://habercigo.com/detective_conan_movie_23_the_fist_of_blue_sapphire_watch_online_redditiy8jt.pdfIn PDF document text
    • https://cdn.sqhk.co/gorokipo/Wqicqgh/15410373494.pdfIn PDF document text
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/0f488cc779cf1bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453144/normal_6027d2d9964ab.pdfIn PDF document text
    • https://vimavopama.weebly.com/uploads/1/3/4/7/134769365/2649d8295666d1f.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/kotodur/girl_guide_brownie_badges.pdfIn PDF document text
    • http://genavologu.rf.gd/27024192032.pdfIn PDF document text
    • http://bapexuzajo.epizy.com/nalisapesotol.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/69840150462.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_off0000bbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBB9 5228 bytes
SHA-256: 9aa60378fa15802211121968378aa608bb0902a801026fc6918d510b0c938a0a
font_01_sfnt_off0000cd82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD82 10280 bytes
SHA-256: dc78b290493b9f682ba6e1872a635c42b54a846f6a7da0b264c154139e4162c2