Malicious PDF — malware analysis report

Static analysis result for SHA-256 4383318a153a0a3b…

MALICIOUS

PDF

78.2 KB Created: 2021-03-03 11:43:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 231fdfc7e381cc7ae7dc1372512944b6 SHA-1: 9ee1bd6b41fa3ab1c91cf6988bd5d092515f8828 SHA-256: 4383318a153a0a3b9cba03b6ebca2749fc5dbef641294c884ec8fe967f41317f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant number pointing to disposable hosting and exhibiting link farm characteristics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/wix?keyword=pandora+unlimited+skips+apk+reddit PDF link annotation
    • http://zipubezexupoka.mywebcommunity.org/bavubefaro.pdfIn PDF document text
    • https://tidixusega.weebly.com/uploads/1/3/1/3/131380021/karasifowekuxudajo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452152/normal_601cdf05eda57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375507/normal_6023c7f5ed8c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493245/normal_603b35b4384d1.pdfIn PDF document text
    • http://vasuxarogaxatix.iblogger.org/getemafagelewiz.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/purufiz/aicpa_financial_reporting_framework_for_smes.pdfIn PDF document text
    • http://faxipobusevive.rf.gd/yahoo_mail_server_settings_for_android_phone.pdfIn PDF document text
    • http://gototura.myartsonline.com/a_link_to_the_past_items_list.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/25332570970.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/beach_buggy_racing_jump_start_android.pdfIn PDF document text
    • http://fivasire.rf.gd/34003373227.pdfIn PDF document text
    • http://kutoxinupuroxo.onlinewebshop.net/jideber.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_off0000f629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF629 5172 bytes
SHA-256: fa99f79ee9bb46563c0ea51f51da4ef4379a6200b58f7622f7e3c82bd7536fa1
font_01_sfnt_off000107a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A6 10588 bytes
SHA-256: a59bc4fa285486b008a11b672f55f6d29df2d89c31a09fbf2f850a7ad9a9a986

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