Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0c6fbce53298997…

MALICIOUS

PDF

78.8 KB Created: 2021-03-16 03:12:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ab451cc4b6dc181b4e8d85114d85387f SHA-1: 8e47ee37847f04ac44bad7660dc309699168cf01 SHA-256: e0c6fbce532989979b1b765cf3aca299180488e5d1d98ad1d92f5b491cc6e575
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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=roblox+gift+card+codes+unused+2019+october PDF link annotation
    • http://xulodol.mygamesonline.org/nec_phone_manual_dt300_change_name.pdfIn PDF document text
    • https://wobofosowipifir.weebly.com/uploads/1/3/0/7/130776138/jalonubefagave_baxekuzoj_rugenisevuvoju_zojux.pdfIn PDF document text
    • https://vonefemupeme.weebly.com/uploads/1/3/5/9/135957005/d3250a1.pdfIn PDF document text
    • http://sepukolobu.sportsontheweb.net/wisukasogubifir.pdfIn PDF document text
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/vegidavuze.pdfIn PDF document text
    • https://bowonalixatan.weebly.com/uploads/1/3/5/3/135347428/5276320.pdfIn PDF document text
    • http://xatovapotogu.mywebcommunity.org/kikaponalatifoluduk.pdfIn PDF document text
    • https://ratudizog.weebly.com/uploads/1/3/5/3/135323835/5410100.pdfIn PDF document text
    • https://tipozuroboga.weebly.com/uploads/1/3/4/2/134265922/2745223.pdfIn PDF document text
    • https://fiwisito.weebly.com/uploads/1/3/4/7/134715438/8543306.pdfIn PDF document text
    • https://bovikobugekut.weebly.com/uploads/1/3/0/7/130775803/1175099.pdfIn PDF document text
    • https://sikupawabur.weebly.com/uploads/1/3/4/6/134624396/zikemagi.pdfIn PDF document text
    • http://sawuzelipo.iblogger.org/simple_past_regular_verbs_negative_and_interrogative_exercises.pdfIn PDF document text
    • http://larebalin.mypressonline.com/maths_word_problems_for_grade_2_addition_and_subtraction.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://niwimugosaz.onlinewebshop.net/badavobate.pdfIn PDF document text
    • https://s3.amazonaws.com/nafamaragisek/aida64_extreme_full_version.pdfIn PDF document text
    • http://supuwevul.atwebpages.com/solikenegosit.pdfIn PDF document text
    • http://gixopiv.onlinewebshop.net/20821514704.pdfIn PDF document text
    • http://vomifavub.epizy.com/xiluvo.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/jefoxujamajefuveda.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/ukulele_chord_chart_beginner.pdfIn PDF document text
    • http://galexuduxegi.epizy.com/87730266888.pdfIn PDF document text
    • http://bexukavibume.myartsonline.com/jokamogazowegosafit.pdfIn PDF document text
    • http://sojufuka.atwebpages.com/fdot_drilled_shaft_design_standards.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_off0000f335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF335 5888 bytes
SHA-256: 58b8961ddf7c887221b0e406047aa9df4fc65658e1a4dff79b40c96fa472f536
font_01_sfnt_off00010759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10759 11268 bytes
SHA-256: 1723e52026f9f2d88ff657db735126b42c1b76cf766a994df5d5f6d16ab8c766