Malicious PDF — malware analysis report

Static analysis result for SHA-256 45cd64a03548923d…

MALICIOUS

PDF

71.4 KB Created: 2021-01-25 21:32:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b5c6aaaafa8bc20c8c21bdc74aff0ecc SHA-1: 5e5dc91cc32f945bf4dc801a07e78a302fac9ee8 SHA-256: 45cd64a03548923dbc915cc4e0ac3a67bf1892c4ba58d2ef72e0d74a6afeabd1
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=free++adblock+extension+for+chrome PDF link annotation
    • https://xanikijopido.weebly.com/uploads/1/3/4/7/134738407/mefixepoj_tejer.pdfIn PDF document text
    • https://cdn.sqhk.co/xoluxuroku/jfwifgc/candy_smash_box.pdfIn PDF document text
    • https://cdn.sqhk.co/jogowijalaro/sAIhgsu/nhl_standings_espn_playoffs.pdfIn PDF document text
    • http://discout.online/nhl_hockey_season_lengthon0zl.pdfIn PDF document text
    • https://lexabefi.weebly.com/uploads/1/3/1/3/131384613/pigil.pdfIn PDF document text
    • https://cdn.sqhk.co/feneradebeza/1ihhDjQ/4_function_calculator_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/a0ismih/95884767823.pdfIn PDF document text
    • http://itrom.fun/texelusurojofowdfl14.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/ifx5Sjh/hello_sharechat_video_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xipepovivik/gejjibs/lipewapurox.pdfIn PDF document text
    • http://kismykeitio.best/68653216285tqkv9.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/toy_story_rc_racer_ride_paris1fgl9.pdfIn PDF document text
    • http://daating19.site/giravixejmfd2t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tivekanudoz.rf.gd/employment_eligibility_verification_form_i-_9_instructions.pdfIn PDF document text
    • http://zerakunutage.epizy.com/balancing_chemical_equations_worksheet_30.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_off0000dac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC2 5488 bytes
SHA-256: 9813123dc4252c7c42a3cc7bf68bc8a56500044c6af70cf9533e3d3a08bcefca
font_01_sfnt_off0000ed48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED48 10508 bytes
SHA-256: 6100f3bad8379bbf8ab81a72a95b3cf3f2e3a37bb13054a634c89e109db82e99