Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa74ed8d3dcf000a…

MALICIOUS

PDF

78.8 KB Created: 2021-02-02 19:45:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8b6694fcf209a848636922d6a0976ead SHA-1: 18ee625c1b4e8a422c0488fbeb8a6c55819f1643 SHA-256: fa74ed8d3dcf000a4643eded85c1e68b9d1ca29abbe0e10d5e8963a1e5b185f8
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/123?utm_term=female+yorkie+poo In PDF document text
    • http://dosemamorozaj.22web.org/sfn_poster_guidelines_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496586/normal_600dfdbbe9853.pdfIn PDF document text
    • http://antonioit.fun/instant_followers_pro_apknrnvj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404112/normal_5feed240cc854.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475852/normal_6017b3832c020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475866/normal_5fdd12e39b75f.pdfIn PDF document text
    • http://naturfresh.space/permissive_parentingm5yxs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415782/normal_5fd2b05099572.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/satudifin/30_day_notice_template_word.pdfIn PDF document text
    • http://fezitovowikawof.epizy.com/cartiform_viable_osteochondral_allograft.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/78373729169.pdfIn PDF document text
    • http://virilos.epizy.com/lagabasa.pdfIn PDF document text
    • http://duxuramubot.epizy.com/pc_building_simulator_free_2019.pdfIn PDF document text
    • http://vefapiba.epizy.com/eng_vs_nz_t20_match_pitch_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/bedlington_terrier_x_whippet_information.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_off0000f7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E9 4908 bytes
SHA-256: 81ebd8a13901f4bdcf7eb9d6414e997f15c21393858805e6ef30c22121fa9325
font_01_sfnt_off00010889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10889 11220 bytes
SHA-256: c33e8cc2cc9fae9e18b3f9e112b5e1b4819aaa5c215ad04a64ba3d851831444d