Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee960c3d8ade41b7…

MALICIOUS

PDF

64.1 KB Created: 2021-02-19 07:15:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 34df258b32273868a557de0699c72321 SHA-1: 2f0a9e8fb581beff42db9c0c4af9f33cc5fae50e SHA-256: ee960c3d8ade41b7e3f6c49be1f8c88f59f3f0d56c29822c3efdf276230984a2
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a malicious intent to redirect users to potentially harmful websites. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the presence of embedded URIs and the nature of the link farm heuristic point towards a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

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 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.
  • 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/123?utm_term=divine+mercy+novena+ewtn PDF link annotation
    • https://pukelubaluwo.weebly.com/uploads/1/3/4/7/134741361/xezarar.pdfIn PDF document text
    • http://amsidisi.xyz/sharp_weather_station_replacement_outdoor_sensorx7y27.pdfIn PDF document text
    • https://regafuraseni.weebly.com/uploads/1/3/4/6/134663643/2527415.pdfIn PDF document text
    • http://groshyk.site/47017449310h5g4m.pdfIn PDF document text
    • http://yewes.space/zuxevagusagoganilefivivonyv7zx.pdfIn PDF document text
    • https://merusedezut.weebly.com/uploads/1/3/4/3/134361649/seseja_somepobekojegu.pdfIn PDF document text
    • http://fineagencyy.com/sertifikat_akreditasi_ban_pt_uns6mn5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454682/normal_5fee87b0afbf4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/barish_whatsapp_status_video.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/enchanting_1-_300_guide_vanilla.pdfIn PDF document text
    • http://mevetilozavasep.epizy.com/vevaxomevobenidubow.pdfIn PDF document text
    • http://gagisejokunego.rf.gd/6343252865.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/ccleaner_full_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/takusemodukawoj.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/employment_application_letter_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/full_size_xl_mattress_sheets.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_off0000c301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC301 4988 bytes
SHA-256: a3497ae5aa41d5f77e7e2d124f0ec77c9e8b4e3c98a7155f20eaae64615c644e
font_01_sfnt_off0000d400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD400 9276 bytes
SHA-256: a457b1be137f7d3f1ba54b77c5822fa130e2ac186eab3d36faef4b390a69e361

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