Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebeb6cac257fc413…

MALICIOUS

PDF

72.2 KB Created: 2021-02-13 02:39:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: d3deab26ce575c0bf1814eb30861d75e SHA-1: f2ba56bf7a8ffe5515aaa32675cc6442b4b78600 SHA-256: ebeb6cac257fc413beb4a9dcdfeb4f38167fd14a527bd0d5b7d6e2486a7b1ce7
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, suggesting it functions as a link farm designed to redirect users to potentially malicious sites. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly support a phishing or malware distribution attack pattern.

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://druttle.ru/wix?keyword=soldiers+comply+with+the+nepa+by PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4506159/normal_601e04815ab51.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465403/normal_5fcc1a15c4bb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474999/normal_5fd0a087ca347.pdfIn PDF document text
    • https://kaxojolomo.weebly.com/uploads/1/3/4/8/134885197/puzig_juvapexeja_vigufunuzim.pdfIn PDF document text
    • https://muduzefob.weebly.com/uploads/1/3/4/0/134018051/wujawagevebof_pekebexeku_zaxomozi_joxexusuvusimun.pdfIn PDF document text
    • https://kidiveguworuriw.weebly.com/uploads/1/3/4/6/134677920/85296e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495241/normal_6017332687ed7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490250/normal_601f38d5df841.pdfIn PDF document text
    • https://xotozefubineru.weebly.com/uploads/1/3/4/5/134576546/bolepetozoder_venuwis_nofokogakow_derebu.pdfIn PDF document text
    • https://nelibijejukeli.weebly.com/uploads/1/3/1/4/131437261/rutokage_nuzaxiwemafi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418565/normal_6003f4787c2a9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ribaxekag.epizy.com/retepadiratosu.pdfIn PDF document text
    • http://vinetewexe.epizy.com/pofuwemaxowutagajikowisu.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/99046443725.pdfIn PDF document text
    • http://fobupozomorefiw.epizy.com/mifev.pdfIn PDF document text
    • http://wuwovedivaz.rf.gd/bumrah_wickets_in_all_format.pdfIn PDF document text
    • http://jajoxutevo.epizy.com/bid_wars_mod_apk_revdl.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_off0000dcfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFD 5752 bytes
SHA-256: 82081f29891f7ec3ec42a660d3f32406c4fb1373da48f615d7f11aef52a201d6
font_01_sfnt_off0000f076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF076 10416 bytes
SHA-256: a65d61fe8684af0b3424e5ea0a7125d535e94c30431c71cef76ae4161efba364

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