Malicious PDF — malware analysis report

Static analysis result for SHA-256 a749db3d50a09df0…

MALICIOUS

PDF

87.0 KB Created: 2021-03-21 06:05:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dd82aeee5f672e5c7a443210b6033d57 SHA-1: 683230410f5ddcfca28e6ca05a171b3e6ad937c2 SHA-256: a749db3d50a09df00059a1508c1c2c8f71c2b152d5051514f816b14805ea74ba
126 Risk Score

Malware Insights

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

The file is a PDF containing numerous embedded URLs, many of which point to disposable domains and are flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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=letter+of+authorization+to+represent PDF link annotation
    • http://wowitaly.pro/the_leadership_challenge_free_downloadhd84h.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/how_to_thread_bobbin_singer_confidence_quilter.pdfIn PDF document text
    • http://gifagudilul.mypressonline.com/powershot_5700m_staples.pdfIn PDF document text
    • http://pakamid.22web.org/performance_characteristics_of_centrifugal_pump_ppt.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/gasomisulafabojuriv.pdfIn PDF document text
    • https://watuluvijigu.weebly.com/uploads/1/3/3/9/133997483/dibijunogopojesukup.pdfIn PDF document text
    • http://innov-cis.net/strelok_ballistic_calculator_for_iphone_freebw909.pdfIn PDF document text
    • http://ruzamaji.getenjoyment.net/laboratory_apparatus_and_equipments_and_their_uses.pdfIn PDF document text
    • http://bajifepeselok.sportsontheweb.net/79454378743.pdfIn PDF document text
    • https://nijeliwawinezim.weebly.com/uploads/1/3/4/4/134497061/solonevuditu_kofaxazew_ronitotivizazub_suvenot.pdfIn PDF document text
    • http://sell-toclick.online/aankh_marey_mp4_song_pagalworldy13d9.pdfIn PDF document text
    • http://lofitner.buzz/nagedihpsg3.pdfIn PDF document text
    • https://kitedagipan.weebly.com/uploads/1/3/4/8/134892955/benil_beduzujavor.pdfIn PDF document text
    • http://fekopowogofeki.22web.org/schema_ampli_de_puissance.pdfIn PDF document text
    • http://wujasonuvilo.mywebcommunity.org/24582792555.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pefimubis.myartsonline.com/duzisipilize.pdfIn PDF document text
    • http://netawuwimirixor.onlinewebshop.net/the_adventures_of_tom_sawyer_comics.pdfIn PDF document text
    • http://toxifiv.myartsonline.com/55563121954.pdfIn PDF document text
    • http://fawikinego.myartsonline.com/sidemen_book_free.pdfIn PDF document text
    • http://wizasagi.rf.gd/13485589662.pdfIn PDF document text
    • http://losapudobo.epizy.com/census_of_marine_life.pdfIn PDF document text
    • http://vumamuv.myartsonline.com/how_to_use_dyson_cordless_vacuum_attachments.pdfIn PDF document text
    • http://melaworogafema.epizy.com/beautiful_girl_image_photo_hd.pdfIn PDF document text
    • http://molujafit.atwebpages.com/15897169152.pdfIn PDF document text
    • http://makakanow.onlinewebshop.net/adhyatmik_pravachan.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_off000118da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118DA 4948 bytes
SHA-256: 031617a4ee8660a1d4fcf9b98010773f8d6b6b5d3dfc474f5414e5bf68a5f1d3
font_01_sfnt_off000129b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129B5 10760 bytes
SHA-256: f552fbd40d2492419631cc0439ea868ee83a4bd39fbd2404f45a9ebfd8a28662

Open this report in the interactive analyzer, or submit your own file for analysis.