Malicious PDF — malware analysis report

Static analysis result for SHA-256 b99184057c2391df…

MALICIOUS

PDF

73.2 KB Created: 2021-03-02 13:58:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0cc7d5068a2f8935a3f485a633dc9df8 SHA-1: ed49b566909e479461a8f344585b0a5f8d0f471e SHA-256: b99184057c2391df6054311f61f916e7bfee1cab0f9d4e9318862cdc1e3121ae
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://crophysi.ru/award?keyword=are+jelly+beans+safe+to+eat In PDF document text
    • https://wusulanapezuvu.weebly.com/uploads/1/3/4/3/134325740/48f07690.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/if5YlLl/xewonad.pdfIn PDF document text
    • https://cdn.sqhk.co/rogapakaler/jciPcU4/my_movies_max_app_download.pdfIn PDF document text
    • http://agent-spv.space/bisalaxozij51jm.pdfIn PDF document text
    • http://kulinar2020.site/georgia_driving_school_practice_testdcqyh.pdfIn PDF document text
    • https://puzepoxa.weebly.com/uploads/1/3/4/3/134318678/putajijure.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407066/normal_5fc744cd4a2b8.pdfIn PDF document text
    • https://belinadojo.weebly.com/uploads/1/3/1/6/131607131/daful_kogik_zemitu_fulixupubib.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/iaji8jg/crashy_cats_eat_fish.pdfIn PDF document text
    • http://nukicew.xyz/karosadf2tr2.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/HoiGhbi/95151978960.pdfIn PDF document text
    • http://uspehdnyaaxyz.xyz/reset_rinnai_infinity_26nxyex.pdfIn PDF document text
    • https://cdn.sqhk.co/dipujabuxiw/je82ahi/stick_out_meaning_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/zolewiko/bj8BJvo/66845062681.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31F 5068 bytes
SHA-256: b064a1121bffe7de45598d7eb7302a36b34cb514c223402dbe624056d3b31be0
font_01_sfnt_off0000f47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47A 10456 bytes
SHA-256: 8f715235d154872f3ebd7fe4297c2741bac2a00c4b6ffdefc27625f40f1a07b9