Malicious PDF — malware analysis report

Static analysis result for SHA-256 33c7f258e740e12e…

MALICIOUS

PDF

74.3 KB Created: 2021-02-17 08:27:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 3e84982a17e64130bd16468a4b768045 SHA-1: 1f8176d79a3865b8d16ef5708aa08482d6ff0c32 SHA-256: 33c7f258e740e12ee30472891472aaa28681524d16056d605356004ebad5b036
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs, one of which is identified as a malicious lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs suggests an attempt to redirect the user to a phishing or malware distribution site, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wix?keyword=happy+birthday+accountant+funny PDF link annotation
    • http://espaceabonnes.com/mogowemanatopeborewilalbyy8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484618/normal_5fd8073878146.pdfIn PDF document text
    • http://ecoservice-vlad.ru/one_time_top_up_electric_irelandkw5k9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490138/normal_5ff526ef6b9a3.pdfIn PDF document text
    • https://kerumeso.weebly.com/uploads/1/3/4/6/134641164/gexeromuxoligiw.pdfIn PDF document text
    • http://richteam.site/75865754281s88l9.pdfIn PDF document text
    • https://cdn.sqhk.co/nigudovowa/jBdiWus/38822910540.pdfIn PDF document text
    • http://lngcliente.com/65124515205j674v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374021/normal_5fca6b09ca215.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/suzixegazunow/alumni_portal_project.pdfIn PDF document text
    • http://xibupafuvobiluk.rf.gd/23952180181.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/passive_infrared_motion_sensor_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/womodokenaxos.pdfIn PDF document text
    • http://xirasajizobopa.rf.gd/aggiornamento_whatsapp_android_ultime_news.pdfIn PDF document text
    • http://merojupamen.epizy.com/52520142118.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/46591179985.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_off0000e6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FD 5236 bytes
SHA-256: 5a21f06f2335ab563b84db1d4c8b9decfebaf5cc3a3159cfcb2cb9eb6d69e1e7
font_01_sfnt_off0000f8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C9 10460 bytes
SHA-256: a3fc1430ae846091819269e3cc201bc6fd335bf7e0f0dbcc2283b52fb5985720

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