Malicious PDF — malware analysis report

Static analysis result for SHA-256 f50066a81d15a6a3…

MALICIOUS

PDF

65.6 KB Created: 2021-03-08 23:27:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87bdead806fe6fe1050713680173e2c4 SHA-1: d1086c22f10698ca36fbb250699d62272da3807c SHA-256: f50066a81d15a6a3ad7a55172300f66adf6750b360b323befd28bf9b31ce8c0d
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. Heuristics indicate it's a phishing or malicious PDF. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing further malware or phishing for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/wix?keyword=waves+101+worksheet
    • https://cdn-cms.f-static.net/uploads/4370542/normal_5fdaf28f36e45.pdf
    • https://static.s123-cdn-static.com/uploads/4486969/normal_5fcdec830f028.pdf
    • http://naxenavuk.22web.org/fifobugijavajetevurebo.pdf
    • http://vodabezoli.iblogger.org/banato.pdf
    • https://static.s123-cdn-static.com/uploads/4368249/normal_5fcdc9c47e4f4.pdf
    • https://static.s123-cdn-static.com/uploads/4495058/normal_60047524b4b85.pdf
    • https://cdn-cms.f-static.net/uploads/4409826/normal_5fd0df9514979.pdf
    • https://static.s123-cdn-static.com/uploads/4370791/normal_5fdde6dd3169a.pdf
    • https://cdn-cms.f-static.net/uploads/4390074/normal_5fdb304413012.pdf
    • https://static.s123-cdn-static.com/uploads/4467038/normal_5fc7468f6edaa.pdf
    • https://cdn-cms.f-static.net/uploads/4450034/normal_601bdde91d409.pdf
    • https://static.s123-cdn-static.com/uploads/4457272/normal_5febb1552f373.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9c43cb74-45e3-47de-9527-fda2e8336169.filesusr.com/ugd/af0aa9_18ef5ac840584a7eae9a5a9fd58a10ee.pdf?index=true
    • https://5926284e-b61c-4ed0-95e5-27b9feedd2c3.filesusr.com/ugd/50c35f_cb85a26d0c0d4304867dee9df4532caf.pdf?index=true
    • https://s3.amazonaws.com/fowikorejodi/jiwifesezuxamerudaruzale.pdf
    • http://tilomid.rf.gd/m_audio_fast_track_c400_price_in_india.pdf
    • https://s3.amazonaws.com/goveruduzewoxu/41551555470.pdf
    • http://tanikotik.epizy.com/amm_aircraft_maintenance_manual_definition.pdf
    • http://resifukizuve.rf.gd/genie_pro_max_troubleshooting.pdf
    • https://c1d61d78-9bae-425c-b347-ee91470fe4f1.filesusr.com/ugd/60933b_5e1c12fc38a94f3aa12f761c6bed1407.pdf?index=true
    • https://s3.amazonaws.com/likerajatob/kenmore_sewing_machine_needle_color_chart.pdf
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_323d9e1534e648aeaa5531a527bac4d7.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5c9.bin
d03ac43c9e291121e10b8ecf996a4313283bcf3e7c67b36d34022dd20aa47ffd
pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C9 5164 bytes
font_01_sfnt_off0000d770.bin
22ea4e8aa4c5e8a2ef9df2b6b180f5e3a01fc450d39c5cbb22857db20e7c07ea
pdf-font-stream PDF embedded font (sfnt) at offset 0xD770 9872 bytes