Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11c50b78a9fe2e2…

MALICIOUS

PDF

70.5 KB Created: 2021-02-15 15:24:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3c7759c66bb84b9127304a00c22c9ecb SHA-1: 20469a08c22df5aff82c3f749a94e62f9368e5da SHA-256: d11c50b78a9fe2e2cff89ae18d0f7f6a1b8154099747ec83f1811057ebe2a6da
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://crophysi.ru/strik?utm_term=lexus+ls+460+towing+capacity In PDF document text
    • https://static.s123-cdn-static.com/uploads/4476443/normal_60017fa3275fa.pdfIn PDF document text
    • https://cdn.sqhk.co/pugijuzo/ijcjihf/kalizalomewuguvemazawon.pdfIn PDF document text
    • https://cdn.sqhk.co/moleselofa/6gijcLX/kexil.pdfIn PDF document text
    • https://cdn.sqhk.co/vimavifuse/VgjgKXR/levi_s_x_star_wars_t_shirt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450631/normal_5fd95bc46cd1b.pdfIn PDF document text
    • http://max-lifting.store/echl_hockey_teams_in_floridal3577.pdfIn PDF document text
    • http://counterman.ru/ba_challan_form_punjab_university_2018iqu1i.pdfIn PDF document text
    • http://burrrhey.tech/energean_oil_gas_annual_reportx9996.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447093/normal_5fe8cfdf4284f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471691/normal_5fe8a5b95d9b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379385/normal_602265a30c671.pdfIn PDF document text
    • https://cdn.sqhk.co/kovixileta/gfcibgh/53045988142.pdfIn PDF document text
    • http://hotel-engels.ru/ubuntu_live_usb_disk_formatrz0pz.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/pozokimepe/choose_your_fighter_meme_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/13097079356.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_off0000d675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD675 5592 bytes
SHA-256: f9578b966890729919d0c2cdbc5e020c749fee803977c5a3c072d9dce5254ade
font_01_sfnt_off0000e9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C6 10424 bytes
SHA-256: 8b6875895e17bae1b335e19d79cc84fcd5fa128529307088a7b0388d0b23b2dc