Malicious PDF — malware analysis report

Static analysis result for SHA-256 722cbf6b478bea30…

MALICIOUS

PDF

69.7 KB Created: 2021-02-26 07:50:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: eef29cde517e962926571b48297691fe SHA-1: 33ea184bb714a58c43033faf509674692df7af39 SHA-256: 722cbf6b478bea30f542b63b4fcb87a9573dfd425527b4aef81c14622ff0b0cd
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/award?keyword=briggs+and+stratton+450+series+148cc+parts+list In PDF document text
    • http://appletopshop.ru/budgerigar_bird_information_in_marathitsuyv.pdfIn PDF document text
    • http://matroskin.space/scope_of_work_template_electricalhh7ki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369631/normal_5fff3ac36b049.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414672/normal_602f56f1d83d4.pdfIn PDF document text
    • https://wonozonozosog.weebly.com/uploads/1/3/1/3/131398184/e87738a19de3b.pdfIn PDF document text
    • http://euroshopme.site/pass_rate_pe_examwce9n.pdfIn PDF document text
    • https://ginuwawabesinu.weebly.com/uploads/1/3/1/1/131164414/6248655.pdfIn PDF document text
    • https://vuwuzujos.weebly.com/uploads/1/3/2/7/132712237/5731660.pdfIn PDF document text
    • https://wanowozuvigamo.weebly.com/uploads/1/3/0/7/130738859/2a7f45c887.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/tawovojo/adobe_fill_and_sign_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/riwibewajerotagafenawu.pdfIn PDF document text
    • http://gawuvuv.epizy.com/agradecer_formalmente_ingls.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/nosifukaxokilurowup.pdfIn PDF document text
    • http://wewefaxekedafoz.epizy.com/risatebaruromebokikutefi.pdfIn PDF document text
    • http://tofaveme.epizy.com/44434506680.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_off0000cbbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBBD 5888 bytes
SHA-256: 98c440ac92be18904cbff017ec8a51529e1a16a7a9d94c41e2a77d073ebaeca2
font_01_sfnt_off0000dfe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE1 12820 bytes
SHA-256: 11e0f030a269f06cba0e72128c91ceab9e6c13c978493ecc7507324d0152897a