Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecc9d0f55d26fb08…

MALICIOUS

PDF

76.9 KB Created: 2021-02-28 06:34:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8cc3298fcb76300ca9bc317c61e18591 SHA-1: 4614658afe6ee3b14981e2fc2c7d9291d4d14dee SHA-256: ecc9d0f55d26fb08b04e90019710a82fc5079b637c40a719462e48754d1562e6
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URLs, such as 'https://xajibur.ru/strik?utm_term=what+is+the+best+sword+fighting+style', suggest a phishing or credential harvesting attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are commonly used to redirect users to malicious sites, aligning with the 'Spearphishing Attachment' technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=what+is+the+best+sword+fighting+style PDF link annotation
    • http://rolopigabetitu.scienceontheweb.net/bloodchild_octavia_butler_summary.pdfIn PDF document text
    • http://wifunagidoli.mypressonline.com/64190832018.pdfIn PDF document text
    • https://woxopipuwesubaj.weebly.com/uploads/1/3/1/4/131453061/3c2618ca1ee.pdfIn PDF document text
    • http://cesaregaspari.com/casio_g-shock_mens_50mm_ga100cf-1a_watch_-_blacky8rsr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370056/normal_5fdd84916f382.pdfIn PDF document text
    • http://eurozone.pro/11028701686w31sd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420441/normal_5ff9f88d58b7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366620/normal_603033fbcd66d.pdfIn PDF document text
    • http://byseles.xyz/51124841384xx8qr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471234/normal_601a2e4c911eb.pdfIn PDF document text
    • http://zumewidife.mygamesonline.org/nuxabutosipebe.pdfIn PDF document text
    • http://opendouche.xyz/how_to_edit_picture_using_paint.nete9tp8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368978/normal_5fdfc53f30a14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485436/normal_5ff7840593a4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420906/normal_6022dd617157a.pdfIn PDF document text
    • https://kumekebiwoxig.weebly.com/uploads/1/3/0/7/130739238/c79c7.pdfIn PDF document text
    • https://pozuzedik.weebly.com/uploads/1/3/4/6/134668333/soduboledu.pdfIn PDF document text
    • https://xudujebu.weebly.com/uploads/1/3/6/0/136090205/latunonemuremojumeza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425515/normal_5fe01c091dcde.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF029 5516 bytes
SHA-256: 878aedbd15a30ad6fc8ea71f9a5064c1beaf93fe3e5b04dd92b3fcb41406113b
font_01_sfnt_off000102ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FF 10292 bytes
SHA-256: c7fb75b0eedd3cbbb6eac85d8739983a25ce50990892ff295c45201c9fd3f480

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