Malicious PDF — malware analysis report

Static analysis result for SHA-256 088506a55432ef6a…

MALICIOUS

PDF

67.1 KB Created: 2021-02-13 21:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 75fc649c32fc54fc46dce18e343f17a0 SHA-1: 53cb67504289eb05dc980e8459767d74a0595f5a SHA-256: 088506a55432ef6af57faf2e0697748bf800812fec3e6b24e1e5f1794d0cb2cf
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=braid+cuffs+online In PDF document text
    • https://cdn.sqhk.co/wadelovelo/iigghgP/lojujamutetovepukab.pdfIn PDF document text
    • http://bt-management.website/tonixuzodefz5zr.pdfIn PDF document text
    • http://trokot-newshop.online/point_mp3_conversord1eo6.pdfIn PDF document text
    • http://classkaod.ru/zozorefijaxevexuvunft4ol.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/gjjLjj1/85035906803.pdfIn PDF document text
    • http://proba7.xyz/om_hindi_movie_mp3_song_download9ous3.pdfIn PDF document text
    • https://xoxomedeze.weebly.com/uploads/1/3/5/3/135308121/fufovofurapume.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/mejifavo/leading_agile_transformation_mckinsey.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/autodesk_vault_2018_handbuch.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/hipertensi_ensefalopati_adalah.pdfIn PDF document text
    • http://tunivepusage.epizy.com/87859308038.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_off0000cb57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB57 5064 bytes
SHA-256: 04cbf721ddb726008660ce89f8cc969a88f0aad79fca317e45421f8e20250704
font_01_sfnt_off0000dc9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9E 10304 bytes
SHA-256: 3dc61f854e61aea60112d125a98ab2ea6defc5761b809fd8791e2d484e85d178