Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef8cb2acdbfc1abf…

MALICIOUS

PDF

71.3 KB Created: 2021-02-25 04:23:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 75d1ed27c508668d03a839217f275051 SHA-1: de32164daf3be2746eecfa6a5b2e1cf9decd1dc1 SHA-256: ef8cb2acdbfc1abfcaa1eed19f39f35ac653b55a5b28dcbd9bc95e253a519086
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/award?keyword=which+element+has+3+electron+shells+%2528energy+levels%2529 In PDF document text
    • http://sale50.pro/52627757098vyypm.pdfIn PDF document text
    • https://maladekokox.weebly.com/uploads/1/3/4/7/134745457/zetezofisoxuna_biduf_tivex.pdfIn PDF document text
    • https://cdn.sqhk.co/kisetofekuzi/jRsuvGh/radio_italia_fm_app.pdfIn PDF document text
    • https://cdn.sqhk.co/koroxofusino/dhjClgi/dorozakifupaxojovisap.pdfIn PDF document text
    • http://reduslim-ordina.site/wedugixerorebidumutoruxedyrzox.pdfIn PDF document text
    • http://delufarado.22web.org/lipless_crankbait_template.pdfIn PDF document text
    • http://neo-tp.ru/amar_o_depender_completojhr5o.pdfIn PDF document text
    • https://cdn.sqhk.co/jidulopavoji/OSiiggM/maze_runner_2_cast_imdb.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/jaggKH1/timapevobawalarog.pdfIn PDF document text
    • https://popuvagilubasi.weebly.com/uploads/1/3/4/0/134018524/vugigovifore.pdfIn PDF document text
    • http://tesocoin.online/popenef5xcfw.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/zuses/luzazamif.pdfIn PDF document text
    • http://novezepif.rf.gd/nufiluvaguwopofu.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/marketing_internship_report.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_off0000da22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA22 5704 bytes
SHA-256: f8fef3e0e586ebd9d6dcab3beaadd981b242e32935e10eb5a3989ec90ce169af
font_01_sfnt_off0000ed8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8B 10088 bytes
SHA-256: 22ac082c51d7159409403f81bfc42f1b3023bf519048fc58540c75fb06c317fd