Malicious PDF — malware analysis report

Static analysis result for SHA-256 a43817ea2569a5d3…

MALICIOUS

PDF

70.9 KB Created: 2021-03-01 08:20:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f8ef4eabefcf35ca805b44f694ddb82d SHA-1: f963b2c35aa38ca97aa7e7a9b4cdd7bdb381844a SHA-256: a43817ea2569a5d36bea7712eccb4b5a93a67d67f7f712997b38631af5b1a624
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://yafferge.ru/wix?keyword=free+synastry+report+no+birth+time In PDF document text
    • https://wonozonozosog.weebly.com/uploads/1/3/1/3/131398184/9883068.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463279/normal_5ff2b330b5cba.pdfIn PDF document text
    • http://kakolamilasaru.medianewsonline.com/python_projects_with_code_github.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/a_song_of_fire_and_ice_in_order.pdfIn PDF document text
    • http://afracheat2.xyz/cobra_200_gtl_dx_reviewhc0bs.pdfIn PDF document text
    • https://dakijixubuleze.weebly.com/uploads/1/3/0/7/130740496/gamuve_runere_wodutefupidurap.pdfIn PDF document text
    • https://bopojebokup.weebly.com/uploads/1/3/1/4/131408204/gimarinixexake.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489057/normal_601cf9b45df5c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pusapovewazigu.onlinewebshop.net/simple_sentence_of_word_weekends.pdfIn PDF document text
    • http://wegugoleta.onlinewebshop.net/mexavawusajule.pdfIn PDF document text
    • http://wuzuruwevirelu.rf.gd/papilles_caliciformes_blanches.pdfIn PDF document text
    • http://geforagegi.atwebpages.com/install_kali_linux_on_raspberry_pi_4b.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC6 5012 bytes
SHA-256: bde57f3385383302e8f4d3d5d01ca8333d86cff54852fc57819ce55111ef5649
font_01_sfnt_off0000dd9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9E 10240 bytes
SHA-256: 3e6d2c927a3602300cff2847c4d868f7c18128728df9ebd43d55efc0b8371e90
font_02_sfnt_off000100a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A5 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c