Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4fbe8074b26d176…

MALICIOUS

PDF

88.4 KB Created: 2021-02-12 05:40:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f0ce889d5132b10740147fc8759216c1 SHA-1: 171667f8f996e30e0173adcc4489b8dac7bdf604 SHA-256: b4fbe8074b26d1769196d24450a76714eb362a5bc54c7f19800fdb89b0720ddf
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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/wix?keyword=russell+anderson+millionaire PDF link annotation
    • https://cdn.sqhk.co/xoberuweri/gehhagh/my_coloring_book_coloring_pages_and_mandalas.pdfIn PDF document text
    • http://stepka2016.xyz/66883899175lv7xq.pdfIn PDF document text
    • https://dotofinadi.weebly.com/uploads/1/3/0/7/130740455/3689941.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzojivemepe/giihahf/63656803305.pdfIn PDF document text
    • http://it50disconto.info/doraemon_video_pagalworlddzz0s.pdfIn PDF document text
    • https://cdn.sqhk.co/ribobujir/jfijwja/77146246692.pdfIn PDF document text
    • http://tiktokfrance.fun/oxford_advanced_learners_dictionary_onlinej6sme.pdfIn PDF document text
    • https://jenafowumavadas.weebly.com/uploads/1/3/1/4/131437472/87cd79995.pdfIn PDF document text
    • http://epipog.com/voice_recorder_free_for_laptopdtuek.pdfIn PDF document text
    • http://tranquils.space/59089778233i4lka.pdfIn PDF document text
    • http://shopyou.online/upbte_revaluation_form_2019_last_dateo5qe5.pdfIn PDF document text
    • http://chambrehq.xyz/pibanenawamukozasi4j0p0.pdfIn PDF document text
    • https://cdn.sqhk.co/kisereta/jc0jdsI/bisazigupu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xofisoroj.rf.gd/71403682737.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/alone_thailand_movie.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_off00011f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F70 4980 bytes
SHA-256: 1e1c5f22aa6f79474e1826c5836ba26aee39708313cdbc7cb958172913a4e76c
font_01_sfnt_off00013049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13049 10700 bytes
SHA-256: fa00de99ff3c69e3c28ece82155b395167b4e5465a84cf1afb0abfdc5f5f6fe3