Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7c6c2b4658982f…

MALICIOUS

PDF

85.9 KB Created: 2021-03-01 07:56:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: f81c8e54f8b94280770161d28fb7ad05 SHA-1: fd886b025142aeb3f3eb0e91f1bd744924aa645f SHA-256: da7c6c2b4658982fd45cd0f3dc6922b9374f160189d8c5e3e62bc1086d31fc9e
126 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The embedded URLs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=sri+lakshmi+ganapathi+stotram+in+telugu PDF link annotation
    • https://cdn.sqhk.co/tejilunuf/hj5iagg/waxijiwekidikawozejufeb.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/fDsjfge/run_rabbit_run_100_elevation_gain.pdfIn PDF document text
    • https://cdn.sqhk.co/vorowobenune/dViciim/tumelutamezodarewov.pdfIn PDF document text
    • http://jodesomuxuduzu.22web.org/2699830675.pdfIn PDF document text
    • http://vimobewawulipiz.mypressonline.com/34544444604.pdfIn PDF document text
    • https://nexudusuje.weebly.com/uploads/1/3/0/7/130740550/7761498.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485165/normal_5fecd01e4803d.pdfIn PDF document text
    • https://bimevaxufozuz.weebly.com/uploads/1/3/2/6/132683359/gizebuvunin_gigarosares.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/54434517185.pdfIn PDF document text
    • https://toripifisesu.weebly.com/uploads/1/3/4/3/134367164/gidebeguluxowonedufa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451352/normal_5feb2ccc2d055.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494661/normal_5fe1717b9c7e6.pdfIn PDF document text
    • https://tumalurezap.weebly.com/uploads/1/3/2/6/132696080/4809341.pdfIn PDF document text
    • https://cdn.sqhk.co/dipopoji/idgMziC/malakexowef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374533/normal_6032a5357786f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vipinib/gisigofivizexow.pdfIn PDF document text
    • http://valupakukav.myartsonline.com/kufisonokavuzari.pdfIn PDF document text
    • http://jafepotafeno.epizy.com/lusekev.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/nosb_full_form_indian_railway.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/chrome_browser_apk_android_2._1.pdfIn PDF document text
    • http://gezixerigalejeb.rf.gd/dubai_car_accident_report_online.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF91 5284 bytes
SHA-256: 8e29c688765b0f3c02990e3bf56f5aaffb8fc53855f198bef98adb26ae1a6850
font_01_sfnt_off0000f14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14F 15296 bytes
SHA-256: 4007b8dc2e2d3e424b0babf12d9c158e440687e375e94354fbfb249f20001262
font_02_sfnt_off000117f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F7 10276 bytes
SHA-256: 775eb5e392727f52c1900e9f0e2b95ebf0c5e3ff7fbb7b4fe825e6cccae04fc9
font_03_sfnt_off00013b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B2D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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