Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b4d5589e671fc4c…

MALICIOUS

PDF

71.7 KB Created: 2021-02-01 15:32:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 02129a29af40becfaaf57960c03169b2 SHA-1: bc96a3751181ba3eca22ccf2dd2f5c3143c7fc2e SHA-256: 4b4d5589e671fc4cf77137fa0a16831a4fe772f19a607197274375dd0a440034
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/shook?utm_term=speedy+cash+san+pedro+san+antonio+tx In PDF document text
    • https://cdn.sqhk.co/dajebala/WTiHab2/kujutovekurijeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481528/normal_5fe0d7d4c3a70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381105/normal_600b1ef46c545.pdfIn PDF document text
    • http://cparta.moscow/853571584467iqbt.pdfIn PDF document text
    • http://show-visitor.xyz/path_of_exile_frame_dropsr0qke.pdfIn PDF document text
    • http://zoraniguza.22web.org/60698667215.pdfIn PDF document text
    • http://medtechnika1.ru/one_touch_drawing_apk_free_download0ng9e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486193/normal_6001fe850edc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367300/normal_5fe64de103f50.pdfIn PDF document text
    • http://leoidet.xyz/candy_crush_saga_level_5329jtjl9.pdfIn PDF document text
    • http://omerkatanalp.com/98685029502631i1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wiwolobeduju.rf.gd/employee_self_appraisal_answers_examples.pdfIn PDF document text
    • http://nowivopikuzud.epizy.com/68363733535.pdfIn PDF document text
    • http://sogigadataga.epizy.com/46384753304.pdfIn PDF document text
    • http://tudifilik.rf.gd/agataliko_nfufu_video.pdfIn PDF document text
    • http://ferenekukosazu.epizy.com/kapuxikil.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/75519535228.pdfIn PDF document text
    • http://kakiserinipo.epizy.com/ieee_template_appendix.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_off0000dabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABE 5400 bytes
SHA-256: 44dcc1abd019f59f43ac2fa27df18153fce4b4df9594a2afb8e0bc17781ee57c
font_01_sfnt_off0000ed23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED23 10716 bytes
SHA-256: e8338f3bdd557c0c1c27060052cefc4b7a69396b436a1fd23198e841a3d56f07