Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c45e17f7fa5fae0…

MALICIOUS

PDF

79.1 KB Created: 2021-03-03 20:11:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3b2f8a785cfb0c87eb61a39a6f4eacc9 SHA-1: ad84aebf33c644d7ca4137ca9f15a85cf5a4ad6f SHA-256: 9c45e17f7fa5fae02c40944e804e9f161ef8cff1fe618ca16cb01892a58f03e4
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to programming tutorials.

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://pelibifir.ru/award?keyword=advanced+python+programming+tutorial+pdf PDF link annotation
    • http://roskycnmx.com/how_to_clean_graco_magnum_x5pp9uu.pdfIn PDF document text
    • http://copyright-infringement.business/whirlpool_front_load_washer_troubleshooting_f218wf5j.pdfIn PDF document text
    • http://smartcreditus.info/riwubidave9iqbd.pdfIn PDF document text
    • http://blognews.top/bexigivedovevonelomirav2pkrn.pdfIn PDF document text
    • http://techanomic.com/singer_futura_ce_100_embroidery_machine4g411.pdfIn PDF document text
    • http://funseeds.site/80622236844w6mk.pdfIn PDF document text
    • http://mukoxadetovewo.66ghz.com/xewex.pdfIn PDF document text
    • http://micrometerdigital.xyz/mulexixilofujowourvj7.pdfIn PDF document text
    • http://normal-id.com/resumen_del_mito_de_las_cavernas_de_platon0d4bi.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/gavapozalilup/85557752390.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/45532160056.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/34147211155.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/baldi_s_basics_android_port.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/90860112238.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/job_interview_questions_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/vifekogimi.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/cisco_2140_firepower_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/putudi.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_off0000f915.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF915 5544 bytes
SHA-256: 8dfb9951bd46b95b1c16114858d84817df61956a543a8f652fa017a9c8d6ca39
font_01_sfnt_off00010bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDC 10188 bytes
SHA-256: 5cdf2f666093d4150878f1ba2aacb6179d9bbc4202249b0ca5f970aa3e163c64

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