Malicious PDF — malware analysis report

Static analysis result for SHA-256 1453cbc9991dc0a8…

MALICIOUS

PDF

164.7 KB Created: 2021-02-11 18:22:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 00d512e0f772cb725c4bf95457f84061 SHA-1: 749cf2771a204e7165b1d16067b1af0069e012ee SHA-256: 1453cbc9991dc0a8e3cc5bda77a7ebfd986700bbbffcae87e572744b052a979b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/wix?keyword=park+se+young+wooyoung PDF link annotation
    • http://dovoxijego.iblogger.org/succession_episode_guide_imdb.pdfIn PDF document text
    • http://genoray.pro/shell_shockers_unblockedw58jh.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolefowi/cMrhc1A/vowamowebok.pdfIn PDF document text
    • http://widuzuduzudovix.iblogger.org/59644009391.pdfIn PDF document text
    • https://kofaxikizija.weebly.com/uploads/1/3/4/3/134336932/rawuledabuvip.pdfIn PDF document text
    • https://kitabenulo.weebly.com/uploads/1/3/0/9/130969432/7889547.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/fWjcjfb/best_video_player_for_windows_free.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/jeibRUw/10767942183.pdfIn PDF document text
    • http://promooffer.site/catalogo_truper_2018_precio_publicoyyjzc.pdfIn PDF document text
    • http://gprofights.ru/72830668516mxv5a.pdfIn PDF document text
    • https://bevowodawalejap.weebly.com/uploads/1/3/4/3/134363876/nisulisekisulolop.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/ejb4ijN/5825213774.pdfIn PDF document text
    • https://cdn.sqhk.co/jawubibegeba/bPghAjc/coc_hack_download_clash_of_magic.pdfIn PDF document text
    • https://juzowesefuzifi.weebly.com/uploads/1/3/0/7/130775985/8949889.pdfIn PDF document text
    • http://uanews.website/vande_mataram_old_song_pagalworldsdx6f.pdfIn PDF document text
    • https://cdn.sqhk.co/ketejeti/GrRsCja/the_maze_runner_2_movie_wiki.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/fapaga/moviestarplanet_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/pufejipalukirojapedajo.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/text_to_speech_converter_app_project_report.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/kujebuvisesazunimigop.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8BC 39100 bytes
SHA-256: 8e323ffce010a53099537ba0f3e262244aa9a508d8f0d509d11bbaa83d80b78b
font_01_sfnt_off00023f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23F51 5080 bytes
SHA-256: 73a4a78a0d25cdb4c9ec6223d63ca308f51ec4639c85424c7d03fc15a9db123d
font_02_sfnt_off000250c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x250C4 16008 bytes
SHA-256: d2017a112798a78ac1e79629948563c127b451f644b17dd35ca65986c2b9b37c

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