Malicious PDF — malware analysis report

Static analysis result for SHA-256 82ba18f9ed0b3359…

MALICIOUS

PDF

83.6 KB Created: 2021-03-15 10:32:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3bf71e6ede4e5ee07180b18798957969 SHA-1: a43c4420cdac5fa09250ef041fc305f7e786c59f SHA-256: 82ba18f9ed0b3359dda66ae47c7458048baebb021c49fbe79d551c50d0bb38bf
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting it's part of a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://jottigo.ru/award?keyword=bush+francis+catatonia+scale+pdf PDF link annotation
    • https://cdn.sqhk.co/kupulifip/jcrjboG/best_customer_service_number_for_expedia.pdfIn PDF document text
    • https://cdn.sqhk.co/sugigevapure/hj7hfhg/mepubuzemagegepotu.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/juwoz.pdfIn PDF document text
    • http://bisipatelaloguj.66ghz.com/geloposawemamewo.pdfIn PDF document text
    • https://cdn.sqhk.co/furabafezuse/kliaVKa/1_clue_words_and_syllables_level_6.pdfIn PDF document text
    • http://kikababono.mywebcommunity.org/falaxakapud.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/65160822517.pdfIn PDF document text
    • https://cdn.sqhk.co/mamabukalom/8hiGhiH/bexesowenoka.pdfIn PDF document text
    • https://cdn.sqhk.co/wipedekis/bgshjgh/master_informatique_alternance_nantes.pdfIn PDF document text
    • http://piguniw.22web.org/40773908514.pdfIn PDF document text
    • https://cdn.sqhk.co/patizuruf/iiQL3kl/navepabizi.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/PkifBje/tuning_fork_sets_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/poxufape/gijhPgc/73625777754.pdfIn PDF document text
    • https://cdn.sqhk.co/telapunojawu/hdKfyrJ/cowbellpedia_mathematics_tv_quiz.pdfIn PDF document text
    • http://gizovivomiz.getenjoyment.net/empirical_study_definition.pdfIn PDF document text
    • http://sofoviwov.iblogger.org/formulas_de_los_volumenes_de_las_figuras_geometricas.pdfIn PDF document text
    • http://gazedalepi.sportsontheweb.net/35872576266.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://72858ab8-d36f-4bc2-b208-e5ec56e76d01.filesusr.com/ugd/3a4e0e_e0e73715cf584b91b19ba37354810803.pdf?index=trueIn PDF document text
    • https://78151a86-a557-4e49-81aa-a2539eea45c7.filesusr.com/ugd/204f4f_357de0c7803e424dbbd17e14a4edd1f8.pdf?index=trueIn PDF document text
    • http://fokoxowikelejex.rf.gd/chiari_malformation_types_wiki.pdfIn PDF document text
    • http://lewimidofi.epizy.com/waganigub.pdfIn PDF document text
    • http://pubemoxux.epizy.com/cuanto_es_1.50_metros_en_centimetros.pdfIn PDF document text
    • https://efe523a3-d756-4f55-ba91-412f3a718e00.filesusr.com/ugd/236571_92c59a3ecd074d2fb3e25620bdd85ec2.pdf?index=trueIn PDF document text
    • http://pozenejuz.rf.gd/washington_redskins_2016_football_schedule.pdfIn PDF document text
    • http://repeputowuz.epizy.com/69229554386.pdfIn PDF document text
    • http://xewarokulix.rf.gd/3d_drawing_tutorial_using_pencil.pdfIn PDF document text
    • https://1a2149e7-ca7f-4e7c-a584-0e483de6f3af.filesusr.com/ugd/9219f8_88b288ec733747069706265d443a60fd.pdf?index=trueIn PDF document text
    • https://5a6df620-610b-4d6f-8f1b-71e936bb70bc.filesusr.com/ugd/1f5cef_3928985f07794d84b84ff5bc3dbaf406.pdf?index=trueIn 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_off00010825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10825 5292 bytes
SHA-256: a7e90ecf7e2940816d0a164f666908693cd327190f1afec5920f9f04df403fd0
font_01_sfnt_off00011a1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1E 11268 bytes
SHA-256: 4e502e10eba14998c72d771815c9b270f2aa50f7115fe428bb5bf7724eb5a904

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