Malicious PDF — malware analysis report

Static analysis result for SHA-256 af9bb6d1b30ef027…

MALICIOUS

PDF

71.3 KB Created: 2021-01-04 14:02:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 4eff189f366075651c68340a3bb416d3 SHA-1: 8a5359de2a5a0b3974feb957aad918ef360dd38e SHA-256: af9bb6d1b30ef027419d6dd5c3c96064e315819ac394f4e167abb15fa312e66e
244 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
  • 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 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.
  • 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://ggtraff.ru/wb?keyword=radio%20italia%20news%20online In PDF document text
    • https://pefodiral.weebly.com/uploads/1/3/4/4/134476409/tumofixerusi_nigimasirazoro_gokodavugav_tekojuwozipekuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466675/normal_5fd72f0d75a12.pdfIn PDF document text
    • https://zexajupa.weebly.com/uploads/1/3/4/6/134692079/94acd.pdfIn PDF document text
    • https://cdn.sqhk.co/sakiforivona/hhgdjgG/russian_bilingual_books.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426421/normal_5fd0655082b08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417526/normal_5fb4256304f73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465144/normal_5fe5bc69e4b18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415745/normal_5fad345f11250.pdfIn PDF document text
    • https://zexunipubu.weebly.com/uploads/1/3/4/8/134877105/mijaruz.pdfIn PDF document text
    • https://wadazujirala.weebly.com/uploads/1/3/4/5/134596454/duwanofajev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376358/normal_5fb6cf4f9c86a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501660/normal_5fc79d348ee74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373527/normal_5fc06c75cfb73.pdfIn PDF document text
    • https://penonogam.weebly.com/uploads/1/3/4/0/134012545/latok-xoxipewa-bijara.pdfIn PDF document text
    • https://cdn.sqhk.co/joxomawezu/enwjdVc/ruligapakovin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446388/normal_5fa73c8ac6b77.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/03d86037-91d4-4981-b0a5-b731d4ec914c/annie_auditions_2016_usa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c369242-3b08-4f0c-a880-53de15a09d0d/14129269748.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_off0000dbe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE5 4820 bytes
SHA-256: 6999205dd09f009f963c9a00a614cd9bbc4e0b66bfd2aee3922bbe0933d28fcd
font_01_sfnt_off0000ec73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC73 10428 bytes
SHA-256: 49cef94579d8eacc96baa3196c1f55426a1b92011f9807352837719b7a8cae71