Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5fb514357d173d5…

MALICIOUS

PDF

90.5 KB Created: 2021-03-19 19:29:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6a538da9da1bcd6da953a3376af7b42f SHA-1: ca461a9331e3610a5334cd0c134f8be9f779a93a SHA-256: d5fb514357d173d5a64d01c2aa7cc04673d425353ccbdacb71912ccc6e93d4e9
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/aws?utm_term=what+is+the+market+expected+to+do+this+week PDF link annotation
    • https://koduvorubosu.weebly.com/uploads/1/3/4/7/134719400/xifodogut_webumak_ferexodu.pdfIn PDF document text
    • https://motaxajofepox.weebly.com/uploads/1/3/1/3/131381237/6945961.pdfIn PDF document text
    • http://damvglaz0.xyz/pisorofozafoxanimo5ld33.pdfIn PDF document text
    • https://rilinozeni.weebly.com/uploads/1/3/1/0/131070652/1d6c6a107.pdfIn PDF document text
    • https://likukekubusaz.weebly.com/uploads/1/3/1/4/131408788/jofopeduwep-xaxuzewekubewo-gufovasapovu.pdfIn PDF document text
    • http://xaninivinekeni.iblogger.org/testdisk_data_recovery_guide.pdfIn PDF document text
    • http://cardio-active.site/15634967833njth0.pdfIn PDF document text
    • https://virutabadipepuv.weebly.com/uploads/1/3/1/3/131398083/8b137487e203696.pdfIn PDF document text
    • https://lukafitujukeme.weebly.com/uploads/1/3/3/9/133997152/jekakemezokaz.pdfIn PDF document text
    • https://bemawupi.weebly.com/uploads/1/3/0/7/130740003/waxivetev-liviganubogog-fupamuwafama.pdfIn PDF document text
    • http://zabopibisoxe.22web.org/benefit-risk_analysis_examples_using_quantitative_methods.pdfIn PDF document text
    • http://ita-talia.fun/cubase_5_setup_freejlxmb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2903667b-e544-4972-ac7f-e5855aaa9b37.filesusr.com/ugd/2cc660_5f65b56ab2fc4606a75ef0263f193109.pdf?index=trueIn PDF document text
    • https://6f465708-eb37-4ee2-8658-ebeec6cd93ea.filesusr.com/ugd/4bb103_778ee044dfa746278740663f40668380.pdf?index=trueIn PDF document text
    • https://f8d4b294-f952-4a11-85e8-0a3036f9bdaf.filesusr.com/ugd/ad8f3a_3b03ba34e524456b875b486c7e421107.pdf?index=trueIn PDF document text
    • http://malinaliwul.epizy.com/lovakivor.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/zuriwevosaxag.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/keurig_2.0_filter_holder.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_off00012333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12333 5516 bytes
SHA-256: ea5c0e0d51e2b238e6b27e832871579925ecda2bf1fec36117febe2d85c1042a
font_01_sfnt_off000135e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135E2 11380 bytes
SHA-256: 99bb2883350ff2dca9aaf60ec6b779305dd9f3fbe2ad69086dcef1175dbfad9b

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