Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c037211a6726c21…

MALICIOUS

PDF

82.9 KB Created: 2021-02-24 02:10:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c1ae50542e0d5a0d6435c478f21b1335 SHA-1: ac5b6e81d448b7fd741e6e7b6fd444b82ebe2c6c SHA-256: 5c037211a6726c210ad2a8be20bd4258031061185b335f854e9d2b3fcd1ec8f5
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://crophysi.ru/aws?utm_term=how+to+tell+hero+4+black+from+silver In PDF document text
    • https://cdn.sqhk.co/sajixobuko/Agighps/best_laptop_deals_amazon_prime_day.pdfIn PDF document text
    • http://best-store.club/general_data_protection_regulation_gdpr_may_25_2018j8u7u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446285/normal_5fe43b9fc5aed.pdfIn PDF document text
    • http://blacktea.space/40492239638le19x.pdfIn PDF document text
    • https://cdn.sqhk.co/rilowikapaz/3ia0Dgd/original_soviet_propaganda_posters_for_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370265/normal_6015d2b06e45e.pdfIn PDF document text
    • http://proflist-kursk.ru/invaluable_en_francais7qfif.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/fggicZn/db_train_simulator_online_japan.pdfIn PDF document text
    • http://goproits.com/laramiwivezh81i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417659/normal_602f7e961654b.pdfIn PDF document text
    • http://biggymstoe.com/multiplication_of_fraction_word_problems_with_answers6p3a3.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/2hiMhgd/welcome_my_little_princess_quotes.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/bupaxomu/mantoux_test_report_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/39685943273.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/announcement_text_exercise.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_off000106a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A5 5524 bytes
SHA-256: 19e808efe38fa0d3e3e43fa8b0073b5dea7a64871c4b635c561e56b18c6fce0b
font_01_sfnt_off00011959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11959 10996 bytes
SHA-256: bcaeaa819aa459949aae5b7a92c1a0e7d39d0f324ba6c6c85ff950b2a4e26a55