Malicious PDF — malware analysis report

Static analysis result for SHA-256 330cfbf9056e4efb…

MALICIOUS

PDF

66.2 KB Created: 2021-01-31 23:41:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: c0382ab3e4015a2776247a29cb65b5c6 SHA-1: 56497d45ab484a19e5d1ec069772cc42252b4a5c SHA-256: 330cfbf9056e4efb71a6d8bb11481a751e34ac2ed8457084b2bf5e37c3fbcaf7
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/shook?utm_term=furniture+mod+installer+by+mrcrayfish+apk In PDF document text
    • http://kmplitka.shop/alien_resurrection_escape_podkfwco.pdfIn PDF document text
    • https://meliwuka.weebly.com/uploads/1/3/2/7/132740471/1e568a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381104/normal_5fd14f18cb0c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370284/normal_5fe55106626ec.pdfIn PDF document text
    • http://akmurzina.com/william_burroughs_blade_runnerwx3cj.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxudofexal/ji2wggV/wozukoja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408180/normal_5fd9899c28ad0.pdfIn PDF document text
    • https://beroloxubotuze.weebly.com/uploads/1/3/0/7/130775422/b53d997cc9a.pdfIn PDF document text
    • https://cdn.sqhk.co/lukumuzu/jDicZhi/chartwo-_billboard_hot_100.pdfIn PDF document text
    • https://tupirusu.weebly.com/uploads/1/3/4/7/134702138/70d1eb2.pdfIn PDF document text
    • https://cdn.sqhk.co/nalawanuxa/oicij5E/candy_crush_saga_game_download_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393188/normal_6007eebaad844.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://putetudufotu.rf.gd/97269286302.pdfIn PDF document text
    • http://jugikan.epizy.com/zazixusileripo.pdfIn PDF document text
    • http://zapuvem.epizy.com/62338924451.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_off0000c65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC65A 5656 bytes
SHA-256: 72bda3862388463e3da678ae4e2d82e8f5bd4da13a6f07c48464d4792b5b0476
font_01_sfnt_off0000d96d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD96D 10116 bytes
SHA-256: e4696f57e354d3c12ab2e8aa0cec9fa62b2cf05dee39cade84e6a0996a9de246