Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dfd45db7654b003…

MALICIOUS

PDF

88.2 KB Created: 2021-02-20 04:28:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9ca6c5aef45c4d6b93ea87b5d3a4c3ae SHA-1: 2ccebc38a4a7d2c07b332339658208a5a979be07 SHA-256: 6dfd45db7654b0035c8e959c74807bf030134e1255d0d1b00d28e1f45602bd42
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/aws?utm_term=korean+english+dictionary+download PDF link annotation
    • https://mawetifatine.weebly.com/uploads/1/3/2/6/132683292/poselugerug.pdfIn PDF document text
    • http://hardcreditcheck.info/what_are_social_issues_in_usawr2z1.pdfIn PDF document text
    • https://regivuno.weebly.com/uploads/1/3/1/0/131070843/vodurinexutarine.pdfIn PDF document text
    • https://wajotirege.weebly.com/uploads/1/3/5/3/135306859/e403823f387c210.pdfIn PDF document text
    • http://waliwosodumobu.iblogger.org/best_cartoon_animation_software_for_android.pdfIn PDF document text
    • https://fajuvupo.weebly.com/uploads/1/3/5/3/135310445/zixerujixi-pogelazizagu-wugexekovatek.pdfIn PDF document text
    • https://nagipunewemog.weebly.com/uploads/1/3/5/3/135315215/9497697.pdfIn PDF document text
    • https://vomasixesex.weebly.com/uploads/1/3/2/8/132815370/426d0fafe5.pdfIn PDF document text
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/bomogafivijo.pdfIn PDF document text
    • https://gejiwafut.weebly.com/uploads/1/3/2/6/132683005/najolumixeg-vurelaku.pdfIn PDF document text
    • http://unosital.space/belgium_national_team_formation_20187dkds.pdfIn PDF document text
    • https://nesiwebe.weebly.com/uploads/1/3/5/3/135399888/mobomuru-labosego-xiresofukilukew-mozaliladew.pdfIn PDF document text
    • http://ninureluxoxanu.22web.org/huntsville_tx_police_department_accident_reports.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nujedanamepo.rf.gd/how_to_connect_dell_wireless_mouse_to_laptop_without_usb_receiver.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/adobe_creative_cloud_cleaner_tool_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/como_cancelar_spotify_premium_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/10390318326.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_off0000edc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC3 13860 bytes
SHA-256: 2bdc6e6c29d783702d0ab53fa2154fe03dfa728b56a9587a1ae1181a0b027d0e
font_01_sfnt_off00011904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11904 5364 bytes
SHA-256: 62c5a4a8634e1d4f510b8a5e83ba10ddef29807dcded52ace478ff558439e598
font_02_sfnt_off00012b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B55 10960 bytes
SHA-256: 97467478754bc43d3a503bd16e9bea610717410cd3cc9b1210cef416f17b3917

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