Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ec8fbfeb78bcd39…

MALICIOUS

PDF

79.9 KB Created: 2021-04-12 11:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f991331eff40802e00c750b103e2c6d3 SHA-1: 4d0aecbe12aadb9bb292856f5024b4fa0f32ce1f SHA-256: 5ec8fbfeb78bcd39bf0dd8c286218be25ecf94b920389dfa20a9d64e7eef9c16
184 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though partially corrupted, includes text related to search queries, suggesting a phishing or scam attempt. The presence of numerous links on disposable hosting further supports a malicious intent to redirect users to harmful sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=where+is+the+alternator+on+a+2001+ford+focus In PDF document text
    • http://serdyukov.pro/974436344492om75.pdfIn PDF document text
    • http://blancop.xyz/39292689289d6o41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484641/normal_602751902604a.pdfIn PDF document text
    • http://businessoutsourcing.org/posuzsohnl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410186/normal_6035e0b6ad4d9.pdfIn PDF document text
    • http://usersdeviceprotectionservice.site/nuzenirejolapuzub3o9ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382618/normal_6041a1ec56e15.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369507/normal_5fffcb1eb92dc.pdfIn PDF document text
    • http://kidupat.getenjoyment.net/mineral_and_chemical_admixtures.pdfIn PDF document text
    • http://novubelugalij.medianewsonline.com/janewufedufirafumavut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376598/normal_5fdd850368256.pdfIn PDF document text
    • http://sis-paypal.com/98482459664jl69r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pofijiserige.onlinewebshop.net/17913007996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28808d55-2c8f-46e4-b2a4-71cb0bb2c4ed/kjv_bible_concordance.pdfIn PDF document text
    • http://xiniwipilanaju.atwebpages.com/wuberixesebag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80031c7d-0dcb-404f-890f-8007abfb1a0e/what_is_education_according_to_authors.pdfIn PDF document text
    • http://ketabigumowun.atwebpages.com/creative_thinking_activities_for_college_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0f8e3da-2a59-4d5c-87de-4e948415426e/82835264701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a368b0-f4f5-4f73-8b31-f469c1598a40/what_is_the_miseducation_of_cameron_post_rated.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a12f8b94-c073-45e0-b681-f68101a910a8/23459805387.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_off0000fcbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBC 5448 bytes
SHA-256: 6560804938f42ad58663567282ec9cb607f97727d6dfaf4c9fd5046fee5f6ce6
font_01_sfnt_off00010f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4F 10132 bytes
SHA-256: ed0616d000880e93d13e111a465dc3dc76e7b6ff466249b5c79fce91ec42cdb9

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