Malicious PDF — malware analysis report

Static analysis result for SHA-256 b903c09ba74c75f8…

MALICIOUS

PDF

71.0 KB Created: 2021-02-16 11:46:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ef2a28cac7d1712eba1d3f712649efa6 SHA-1: edc512c1a041a009c678261536142e3686475653 SHA-256: b903c09ba74c75f879948e7ddafbb4c345f05a1028da387824ebc88daaac4e14
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/wix?keyword=pitbull+puppies+for+sale+in+tulsa+oklahoma In PDF document text
    • http://barbanapoli.moscow/kusedopemaw6kpa.pdfIn PDF document text
    • http://widarexidifazi.iblogger.org/cymera_for_android_phone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382621/normal_6021cbcf7d3e3.pdfIn PDF document text
    • http://xabibumat.iblogger.org/definition_of_forms_of_business_organization.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/MjgjcdH/no_man_s_sky_multiplayer_not_working_ps4.pdfIn PDF document text
    • http://sollabs.xyz/jee_b_arch_2019_question_paper60fna.pdfIn PDF document text
    • http://basvuruizleme.online/jevefaxuwuf09ll2.pdfIn PDF document text
    • http://instapriz365.online/4liker_instagram_followers_app5ty3p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378390/normal_5fd82ffbdc139.pdfIn PDF document text
    • http://help-verification.com/download_novel_alma_aridathavtcfl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383170/normal_6022c9abb0a2e.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/jjhjKhc/photo_mixer_apkpure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443342/normal_5fe7f5593a8c3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jaxuziwemulogel.rf.gd/understanding_orthographic_projection.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_off0000d9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D0 5348 bytes
SHA-256: d481755aac098f03aa1c7f878e29e07f8f6ec8ab1925a7f2904a5ff45aa21a01
font_01_sfnt_off0000ebcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCD 10368 bytes
SHA-256: 43b70f9c59a8172c38593e4b0022e733bf75166a8fda63c5ab90e48df98337cf