Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc280671cdfad98…

MALICIOUS

PDF

83.7 KB Created: 2021-04-06 06:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 83869849cb59ddf94e1cbcb22be96544 SHA-1: 2492e895cea9ebfd705be06886c5ac208a33b6b5 SHA-256: ebc280671cdfad980912510254f234dc9c98b5b98bb3ecd1ec51ea3243f35a34
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 high-confidence ML classifier and ClamAV detection, indicating malicious intent. The presence of numerous external URIs, particularly one pointing to 'bologen.ru', suggests the document is designed to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/strik?utm_term=the+maze+runner+3+cast PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470685/normal_5fd8bde56ff0a.pdfIn PDF document text
    • http://raxawevamavox.getenjoyment.net/ripixutosid.pdfIn PDF document text
    • http://tobufupevujuma.mygamesonline.org/xelituvudujagigisas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477892/normal_60696694e5236.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365600/normal_6009a2cb6a6a1.pdfIn PDF document text
    • http://fuvagezilavez.mygamesonline.org/9286591975.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/alimentacion_balanceada_minsa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427523/normal_5fe4f0a20b517.pdfIn PDF document text
    • http://jofufunobek.sportsontheweb.net/47316799467.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/jsblidA/american_football_positions_names.pdfIn PDF document text
    • https://cdn.sqhk.co/pijuvedozuw/ipJgSCb/gunixabopu.pdfIn PDF document text
    • https://cdn.sqhk.co/jifibipex/f4idcgg/7261411434.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_9498d53dc23f45e78a3e4299a266481a.pdf?index=trueIn PDF document text
    • http://xumutopefar.rf.gd/questionnaire_validity_and_reliability.pdfIn PDF document text
    • http://dojafeduzig.myartsonline.com/bangla_comedy_sruti_natok_script.pdfIn PDF document text
    • http://sazexuxezife.rf.gd/vudafofijenirajibamas.pdfIn PDF document text
    • https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_ad708f1a82c34a57af1e4e1b970adb0e.pdf?index=trueIn PDF document text
    • https://6346cca1-8be9-442e-91e0-e35201572fa6.filesusr.com/ugd/a8c077_02236bfd1f5541d89ed9c6858f103370.pdf?index=trueIn PDF document text
    • https://33b7cf8b-1cb2-46d9-9063-17e97cba5e80.filesusr.com/ugd/9edd50_9286919eba88483c80103ad73f5bf020.pdf?index=trueIn PDF document text
    • http://tegiledo.epizy.com/52560058788.pdfIn PDF document text
    • http://fizaveloxuraje.rf.gd/detujir.pdfIn PDF document text
    • http://tifojuluguzix.epizy.com/phrases_and_clauses_worksheet_answers.pdfIn PDF document text
    • http://tevefetilojas.atwebpages.com/is_the_selection_ever_going_to_be_a_movie.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6B 4892 bytes
SHA-256: 792f2c2cf3a57bb707c8dcfa1d3466ac42ca47c53df93085d2d4a453885cc7d8
font_01_sfnt_off00010bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD9 11400 bytes
SHA-256: 946d3711be8c15fcf7c4a285539cf2d5a6ba8e870ba16a4df4d9131d1a990be4
font_02_sfnt_off000132a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132A3 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230