Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffcdcb3bc5326e58…

MALICIOUS

PDF

75.0 KB Created: 2021-03-13 17:21:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 67792900d15a507c048b7ab0ea71f0bf SHA-1: ea067dc67a7210180e631dd993af0876c306f5a8 SHA-256: ffcdcb3bc5326e589715ec2838507c0d5684cd9ecc52d8cff30b36e134dab940
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 disguised as a notification for 'Ibps clerk results pdf'. The ML classifier and ClamAV detection strongly indicate maliciousness. The presence of multiple unknown reputation URLs suggests a phishing or malware distribution attempt, likely leveraging the embedded URL to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nipisod.ru/award?keyword=ibps+clerk+results+pdf PDF link annotation
    • http://ouily.xyz/95283022001s1hq2.pdfIn PDF document text
    • https://cdn.sqhk.co/wareberefiz/ifYwEjd/97000507130.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528260/normal_601717b863971.pdfIn PDF document text
    • http://lifeit.pro/fupojoyqeml.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465564/normal_60335900204e7.pdfIn PDF document text
    • https://cdn.sqhk.co/kasuwajavi/ejgbblY/pivewone.pdfIn PDF document text
    • http://soinjaga.ru/37923599541k9rax.pdfIn PDF document text
    • http://car-test.pro/aetna_provider_complaint_and_appeal_form_20184ct13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485157/normal_5fd0ff8b6819a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415936/normal_5fdfd6e4e7665.pdfIn PDF document text
    • http://natlegend.space/how_to_connect_ps4_gold_wireless_headset_to_phonevkvov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467306/normal_600f606b1bf97.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/hclhJgf/41374669172.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/dViiOjf/nazugudupulatezobapuxov.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/vovuzize/verb_worksheets_for_grade_1_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/65115828932.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/gombrich_the_story_of_art_review.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/bcbs_nm_medicaid_prior_authorization_form.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzakob/63507172214.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/77306309880.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/22026860841.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/videoder_apk_para_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/dujidatomomezurex.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/fidizigexokotaji.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_off0000e721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE721 5080 bytes
SHA-256: c1c4eda9e8e008d2ccf5c94079b201011fd80015634e05461a3be8a3bdc4fc79
font_01_sfnt_off0000f872.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF872 10732 bytes
SHA-256: 09b84d4ef345859bea2450e05807285f0b06771b8546e96b49a6973c577be9b3

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