Malicious PDF — malware analysis report

Static analysis result for SHA-256 028b28851d0c1853…

MALICIOUS

PDF

71.9 KB Created: 2021-03-03 06:57:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 4e74b645f46200afa20484affc952f21 SHA-1: 84060d9adc93d79754a407a25587dfd167a8f65e SHA-256: 028b28851d0c1853793448317d7749fc46d1de546f5b8e37fd4ee7145b039dbd
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 URI pointing to a malicious domain, identified by both heuristics and a machine learning classifier. The document body, though heavily obfuscated, suggests a lure related to 'ncea 2020 changes'. The presence of multiple unknown URLs indicates a phishing or credential harvesting attempt.

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://druttle.ru/wix?keyword=ncea+2020+changes PDF link annotation
    • http://findonelove.online/codashop_ml_pro_modv3ye6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485801/normal_600f2d01d4fb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_5fe7ce9d834e8.pdfIn PDF document text
    • http://prosale.company/download_driver_scheda_madre_asus_m2n68-am_plus5z8mn.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/59517697766.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369912/normal_5fde48bf457ea.pdfIn PDF document text
    • http://fumatiw.mypressonline.com/how_to_use_ergo_baby_carrier_with_infant_insert.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450438/normal_5fdfca56d1865.pdfIn PDF document text
    • http://kismykeitio.best/2971130335rte6g.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/sinamozagemoger/bienestar_general.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/53942879665.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/us_amendments.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/2006_chrysler_sebring_touring_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/rokimapapa.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_off0000dcad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAD 5176 bytes
SHA-256: 78ac53a4d937955264a23fe10583216dff5ffe3476d9367253fce780c346a605
font_01_sfnt_off0000ee51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE51 10296 bytes
SHA-256: 5d10f686e619256ef6237b588f8aab9a9b9524f4d18dd7b87eaa2d62e1b8258a

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