Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6323f3c689c3eb…

MALICIOUS

PDF

61.0 KB Created: 2021-02-24 01:09:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 247a3fe0ee52e21f545e40a13b223e62 SHA-1: 79221d21997ba062525bfb6da87416ce091dbbec SHA-256: de6323f3c689c3eb732be53616b73c57040a81e5165186c1581bce0f4d9efb35
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=cub+foods+jobs+plymouth+mn In PDF document text
    • https://sazunanu.weebly.com/uploads/1/3/4/5/134596286/givekoxade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402933/normal_60218e512d808.pdfIn PDF document text
    • https://pemowazazafal.weebly.com/uploads/1/3/5/3/135385959/15e0c7451.pdfIn PDF document text
    • https://todumubisopid.weebly.com/uploads/1/3/5/3/135312552/noxagetonapapafo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_5fe69ebace9ba.pdfIn PDF document text
    • https://fanamavikere.weebly.com/uploads/1/3/4/6/134610997/jupaxapufilekudeg.pdfIn PDF document text
    • https://juwexulomo.weebly.com/uploads/1/3/4/3/134385858/7128105.pdfIn PDF document text
    • https://nazumuliwoj.weebly.com/uploads/1/3/1/3/131383416/5381400.pdfIn PDF document text
    • https://zoguripan.weebly.com/uploads/1/3/1/0/131070442/7757765.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/nuvukivaxiren/zagumaxabonumowuroxe.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/windows_media_player_11.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/kokaziwovafex.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/fawedekibokujupusivuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/how_to_backup_android_photos_to_mac.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_off0000b533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB533 5196 bytes
SHA-256: 64559a95c5ca2584dbdd9b2fd4330d332fed5f990967f9092b75527d4f033d3c
font_01_sfnt_off0000c6c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C0 9640 bytes
SHA-256: 8286c3015e08768562b047fa04e6a2ca34016d85edbb8ba93524835ceee95c55