Malicious PDF — malware analysis report

Static analysis result for SHA-256 e585bda09a393bb7…

MALICIOUS

PDF

77.7 KB Created: 2021-03-14 16:36:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5987cff4f91463ee1c89201856064049 SHA-1: 35b5118007227d5643597af620961b1099b657ed SHA-256: e585bda09a393bb70b7d3751aa6dc5df2aa5e4963cfdf01a7b0897c6f11c3cc6
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, as malicious and phishing-related. It contains numerous embedded URLs, with a prominent one pointing to 'resalured.ru', suggesting it's designed to redirect users to potentially harmful content. The PDF's structure and the presence of many links indicate it functions as a link farm, likely to distribute malware or facilitate phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/strik?utm_term=how+do+you+remove+keurig+water+filter PDF link annotation
    • https://cdn.sqhk.co/xederebat/vhf4Cgf/9525763462.pdfIn PDF document text
    • http://gerisekazaleg.22web.org/96519904431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413976/normal_604d0beadefc4.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/pezekaji.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/hMsGzVP/worododobiduruwibulusefoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500668/normal_6017f95a9c797.pdfIn PDF document text
    • http://zotegomowivin.22web.org/vutedakejamobaxigaxubelun.pdfIn PDF document text
    • http://italy-small.space/mtu_engine_manual155tg.pdfIn PDF document text
    • https://cdn.sqhk.co/gujipiror/hghgwzO/swing_sets_on_sale_cyber_monday.pdfIn PDF document text
    • http://goldenframecollision.com/4378296463115xgm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491153/normal_6039da10ca258.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413719/normal_5fc892ff26131.pdfIn PDF document text
    • http://nonretloli.site/93450575453mk1yb.pdfIn PDF document text
    • http://cmbmarketing.agency/is_graco_or_safety_first_better8c3wo.pdfIn PDF document text
    • https://cdn.sqhk.co/keridola/jhehfif/77180991975.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f635e5d9-31b1-4f19-b758-7a623be10181.filesusr.com/ugd/6cf0f5_a1bd95e9c5924eb2b317ad52ec2c1f66.pdf?index=trueIn PDF document text
    • http://kutoxinupuroxo.onlinewebshop.net/anatomical_movements.pdfIn PDF document text
    • https://d6aab468-caab-4d9e-910f-d3bf64ae4104.filesusr.com/ugd/5438e3_bd4bbdeeabec434280a37187953704e8.pdf?index=trueIn PDF document text
    • https://c33c3ce4-fa2f-4f19-9477-7a801b41b29e.filesusr.com/ugd/ebbcbd_119f115d6cc0400db5e6e3c540a50c71.pdf?index=trueIn PDF document text
    • http://tuxabatadifu.onlinewebshop.net/bipezerevetevipofes.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_off0000f303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF303 5328 bytes
SHA-256: 20b62225add1b212cd68ea26feff83e9769abe4cda9573e61f3f5abf9df89bb7
font_01_sfnt_off0001052b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1052B 10608 bytes
SHA-256: ba4895edeb141b6b91fd834ca2233ed1d2905ce7167437cc7738133a16f5c52c

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