Malicious PDF — malware analysis report

Static analysis result for SHA-256 252ee557e1166614…

MALICIOUS

PDF

67.3 KB Created: 2021-02-07 00:40:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4dfbe494cffa48f4592df30c7ea38edb SHA-1: b0edb6f6d91d2f4d19e8e2034181f28cf5ce8093 SHA-256: 252ee557e116661430d87d01155bcfe875503d4c52a800286bdf87847867aadc
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://druttle.ru/wb?keyword=amazon.%20co.%20uk%20%20order%20history PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388405/normal_5fdb54e2a5028.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488335/normal_5fd696c185682.pdfIn PDF document text
    • https://jifofavara.weebly.com/uploads/1/3/4/6/134631997/0fff483f71290.pdfIn PDF document text
    • http://rabisoluvilava.iblogger.org/90698112184.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407780/normal_5fea25aa18ed4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403539/normal_5ffb918d9d307.pdfIn PDF document text
    • http://gojuwogerex.iblogger.org/aiims_bsc_nursing_online_application_form_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416930/normal_5fec500672573.pdfIn PDF document text
    • https://nuvipepive.weebly.com/uploads/1/3/1/4/131409498/nerinove.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412164/normal_601b29e6a2276.pdfIn PDF document text
    • https://kebetesoma.weebly.com/uploads/1/3/2/6/132695457/ranokeposupev_zuneri.pdfIn PDF document text
    • https://sukodijam.weebly.com/uploads/1/3/4/5/134516983/e207ab2e00d1cdb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dujibagakag.epizy.com/38997820605.pdfIn PDF document text
    • http://luvufipujadazik.rf.gd/bahishti_zewar_mudallal.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/battle_trip_yogyakarta_sub_indo.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_off0000c87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC87D 5384 bytes
SHA-256: 72f15eb4a904e6fe9b0fabea563ad00e670c6a9f423a5453c3b6a4962bd7e8c1
font_01_sfnt_off0000dab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB4 10536 bytes
SHA-256: 622be7e6977a659f3820fa1c1e34aa36cafaca0d7d7f60f0d5d6c4dfe6000c0b