Malicious PDF — malware analysis report

Static analysis result for SHA-256 d877ae7d5349acb7…

MALICIOUS

PDF

68.3 KB Created: 2021-02-22 13:38:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8334fc4adabed2f58a5333ec63bf1fe3 SHA-1: 0af05f7c808b189b5172a5acce65cb8ccd721f21 SHA-256: d877ae7d5349acb710e4ac6c3a4811798b775a5bc76d2609b8c18af86110aeeb
126 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/wix?keyword=practical+guide+to+transfusion+medicine+3rd+edition PDF link annotation
    • http://paganel.world/download_aplikasi_rec_screen_recorderygsfv.pdfIn PDF document text
    • http://tihefers.online/bored_pile_design_calculation82ot5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372967/normal_5fd30e7390d92.pdfIn PDF document text
    • https://vibofizetukoz.weebly.com/uploads/1/3/0/9/130969748/827ab0a09a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383805/normal_5fda2a49016be.pdfIn PDF document text
    • http://coupons2020.info/27473647892v3qfl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481852/normal_5ffe012ab6968.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465007/normal_600746a3cedce.pdfIn PDF document text
    • http://copyrightnotice-ig.com/49629403231rb631.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/tesapibebujep/cool_dark_backgrounds_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/amazon_android_app_store_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/calculator_software_for_windows_10.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_off0000cca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA0 5508 bytes
SHA-256: f6f92fbafe351ce929589e5be36ca41c1d0912f3e321ccca410cf12fe70ad154
font_01_sfnt_off0000df42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF42 10712 bytes
SHA-256: 2dbdb72c1e519ffcb75b122f597c2545c191c2cbcf7d2fa217a45a85a45efdca