Malicious PDF — malware analysis report

Static analysis result for SHA-256 d56bb999728bbab7…

MALICIOUS

PDF

72.1 KB Created: 2021-03-02 21:26:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 7cba68620e19b03aefbf262ed74992c9 SHA-1: ece13d73edb7fac7aa0b3313e34ddfd5e5f1eb31 SHA-256: d56bb999728bbab7fc2acc3a7746ddc7fd6fb1f6589614935b0f8f1b8e991a52
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://yafferge.ru/wix?keyword=%25D0%25B2%25D0%25BF%25D0%25BB%25D0%25B8%25D0%25B2+%25D0%25BC%25D0%25B0%25D0%25B3%25D0%25BD%25D1%2596%25D1%2582%25D0%25BD%25D0%25BE%25D0%25B3%25D0%25BE+%25D0%25BF%25D0%25BE%25D0%25BB%25D1%258F+%25D0%25BD%25D0%25B0+%25D0%25B6%25D0%25B8%25D0%25B2%25D1%2596+%25D0%25BE%25D1%2580%25D0%25B3%25D0%25B0%25D0%25BD%25D1%2596%25D0%25B7%25D0%25BC%25D0%25B8+%25D0%25BF%25D1%2580%25D0%25B5%25D0%25B7%25D0%25B5%25D0%25BD%25D1%2582%25D0%25B0%25D1%2586%25D1%2596%25D1%258F In PDF document text
    • https://cdn.sqhk.co/salavogi/hhhgjbn/13847890452.pdfIn PDF document text
    • http://tokepubex.getenjoyment.net/5748369762.pdfIn PDF document text
    • https://cdn.sqhk.co/tamaladafa/icjfFhg/33190444761.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/zurakopu.pdfIn PDF document text
    • https://cdn.sqhk.co/toviranevu/cyYgegf/waze_app_not_working_with_bluetooth.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/barnett_jackal_crossbow_hard_case.pdfIn PDF document text
    • https://dorakipep.weebly.com/uploads/1/3/4/7/134747047/vabajoxuna-nanowikene-gakukadaxivanur-guruloretexejab.pdfIn PDF document text
    • https://cdn.sqhk.co/vixawutozama/iECggXg/average_starting_salary_mechanical_engineer_texas_a_m.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/how_to_make_lg_front_load_washer_spin_only.pdfIn PDF document text
    • https://cdn.sqhk.co/zanivuwiduvo/8hdCpgd/color_picker_chrome_dev_tools.pdfIn PDF document text
    • https://fusazalokedukek.weebly.com/uploads/1/3/4/7/134729088/561193.pdfIn PDF document text
    • https://fexaxotira.weebly.com/uploads/1/3/5/4/135401388/mexitimukufifadenig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://madanekobovuge.epizy.com/cinematic_movie_trailer_sound_effects.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/tipos_de_sistemas_de_informacion_en_informatica.pdfIn PDF document text
    • http://movedubeliw.epizy.com/54281706792.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/ziwalewinukeworedonorug.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_off0000cf37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF37 5872 bytes
SHA-256: eafaa9ce002ace3d9f8d350f23439084f347312c1bf11c3ce0cb8e562eef399d
font_01_sfnt_off0000e2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BB 14272 bytes
SHA-256: 50fe8d895d3987835ded5b24292c8882bd5da6f042fa94eacd64d77d7852cb98