Malicious PDF — malware analysis report

Static analysis result for SHA-256 5899d4e4766bf45c…

MALICIOUS

PDF

82.1 KB Created: 2021-02-19 05:30:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 525c915cc8635597420685c186e26cb1 SHA-1: eb092764a6bbf2868e0370d13adecbffb94dcf0c SHA-256: 5899d4e4766bf45ce341f9d2f74951b52354b9b3d9fb74e95fdc27cc81a5e145
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/aws?utm_term=converging+media+5th+edition+ebook PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4495254/normal_5feb4bde7cd9c.pdfIn PDF document text
    • https://cdn.sqhk.co/nutakurij/J8wZigc/du_application_portal_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405652/normal_5ff33cf9e1754.pdfIn PDF document text
    • http://testersairf.xyz/buvusisuwamn6233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462992/normal_602adab225c70.pdfIn PDF document text
    • https://vasinurevesodux.weebly.com/uploads/1/3/4/6/134605286/vakibu.pdfIn PDF document text
    • https://cdn.sqhk.co/jerizukop/higzpyf/zombieland_double_tapper_rules_list.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/h3iiwTg/bafananonizunidinabul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458623/normal_602f14e19aafb.pdfIn PDF document text
    • https://donelodef.weebly.com/uploads/1/3/5/4/135401433/1305416.pdfIn PDF document text
    • https://cdn.sqhk.co/nepofigiper/jHghuha/70141742788.pdfIn PDF document text
    • https://rezemofojo.weebly.com/uploads/1/3/5/3/135321986/lidapajepibepenonir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368772/normal_5fdf006a62a8c.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/dotivaf/aggiornamento_android_8_huawei_p9_lite.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/bosupupibavule.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_off000103e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E1 5320 bytes
SHA-256: 9780d542099a41cee8112639382026d71a5de21dc82eb769eac14fe9cb6fd2a3
font_01_sfnt_off000115d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D1 11064 bytes
SHA-256: ed142e25c7bf52fa21780a290e0c8260dd3d6bda7507b1b846c06552b937bf6c