Malicious PDF — malware analysis report

Static analysis result for SHA-256 974587fdff0582e5…

MALICIOUS

PDF

72.2 KB Created: 2021-02-25 15:54:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: fadf0c620d4a0fe1f0a1ec83bd8a7da1 SHA-1: 4d55d6601f3d980b5284cd855180d82f12a0cb60 SHA-256: 974587fdff0582e50c159969a8679fbbaba4d35f3578a6cb8abf9b4664a64213
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/award?keyword=how+old+is+my+magic+chef+refrigerator In PDF document text
    • https://cdn-cms.f-static.net/uploads/4467593/normal_600b33d946178.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486565/normal_600cf48a09499.pdfIn PDF document text
    • http://uaportal.site/78037904246p25jf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461201/normal_6004c02faaddf.pdfIn PDF document text
    • http://vehicleinsusa.com/quantum_chemistry_bookwt64b.pdfIn PDF document text
    • http://wixiziz.iblogger.org/77683394203.pdfIn PDF document text
    • http://koreanluxe.com/odyssey_with_line_numbers9kaj7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450147/normal_601d2cacc9afa.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/2VJpVhb/slot_car_racing_sets_hobby_lobby.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467560/normal_6029334cb72ca.pdfIn PDF document text
    • http://aicberg.net/simplification_questions_for_ntpcasvzp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413986/normal_5fcdd9205c17c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jezevenakos.myartsonline.com/what_month_to_plant_tomato_seeds.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_off0000dd40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD40 5592 bytes
SHA-256: 654d4fb0f7b95db22e7114c275af482e66e9c3f838a1811d1678eb308678d27f
font_01_sfnt_off0000f030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF030 10488 bytes
SHA-256: 7620f74a72f4e0ab7f05c896aeaeec8aae7712fb4ccbd4f8820fe3b65664121e