Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b9224e2632e00d7…

MALICIOUS

PDF

75.1 KB Created: 2021-03-06 04:33:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 93ad00f5f32d05a3a81eac5beb363bc9 SHA-1: 5aa7fe0adf4acb94b3f25aa4747aea7c781271c2 SHA-256: 7b9224e2632e00d7ed20c8285dbf44355bd75bf002cbf541cc8e96a02acdcd75
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. ClamAV also detected it as Pdf.Phishing.Trojan. The embedded URLs likely serve as lures to malicious sites or to download further payloads.

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 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://maypoin.ru/123?utm_term=how+many+years+to+be+vested+in+trs PDF link annotation
    • https://nijupafubowawiz.weebly.com/uploads/1/3/4/0/134012726/b2781a89ad61.pdfIn PDF document text
    • http://govnososal.xyz/whatever_happened_to_michael_from_the_blind_sidey6faz.pdfIn PDF document text
    • http://myfoxing.online/zodiac_signs_amazing_factsxr6vg.pdfIn PDF document text
    • https://sewajevujunu.weebly.com/uploads/1/3/2/8/132814136/fa7c7f2.pdfIn PDF document text
    • https://tatogupuragafa.weebly.com/uploads/1/3/4/0/134096405/mitegopiv.pdfIn PDF document text
    • http://lnstagramoriginal.com/beats_studio_2.0_wireless_replacement_headbandlocoh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490129/normal_5fc6f0528e8b3.pdfIn PDF document text
    • http://servempieza.site/badoo_verification_photo_bypassfb8ff.pdfIn PDF document text
    • http://gatorama.site/uglies_scott_westerfeld_genreu7gnl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387224/normal_6025b27fd2947.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500878/normal_5ffbe95d7dc95.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vizijikiwoler.rf.gd/18577092543.pdfIn PDF document text
    • http://gibovutapobubu.rf.gd/watch_live_football_stream_on_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/preeclampsia_guidelines_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/how_to_remove_motion_sensor_light_switch.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/jenasikezirevoz.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/informante_minero_cerro_verde.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/budget_tracking_excel_spreadsheet.pdfIn PDF document text
    • http://vubulebutaxa.epizy.com/kapuvarilu.pdfIn PDF document text
    • http://vezapuro.rf.gd/89959392846.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/photo_collage_maker_free_without_watermark.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/live_nettv_4._5._1_apk_uptodown.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/22492342708.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/g-shock_mat_moto_tough_solar_japan_set.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_off0000e959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE959 5292 bytes
SHA-256: 8aff67449fd464adb2a42e2433a05ebfee06e8254ed99fc75b856062b2dd3573
font_01_sfnt_off0000fb54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB54 10268 bytes
SHA-256: 507c6bc0b5b2ef449d2c5b75592d3e80d91c7306aa5ff1f31f2e425984a6c930

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