Malicious PDF — malware analysis report

Static analysis result for SHA-256 e792c2d90d7e04ed…

MALICIOUS

PDF

70.8 KB Created: 2021-01-06 16:57:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d67a6acf649d9d24f0e29f627fbc2e6a SHA-1: 1c459196edf257e6943810d22f3d1d9d8465b9bd SHA-256: e792c2d90d7e04ed6d1a76d7592733711ec923f93e96c2c02f107afbbe79e2f2
154 Risk Score

Malware Insights

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

The PDF file contains embedded URLs, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, appears to reference a 'Honeywell thermostat user manual', suggesting a phishing lure. The presence of a malicious redirector link and the ML classifier's high confidence score indicate a high likelihood of malicious intent, likely to download a second-stage payload.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/123?utm_term=honeywell+thermostat+th8321wf1001+user+manual In PDF document text
    • https://static.s123-cdn-static.com/uploads/4450630/normal_5fc45e643785d.pdfIn PDF document text
    • https://vidapinuluselas.weebly.com/uploads/1/3/4/8/134865598/5577076.pdfIn PDF document text
    • https://zerexiborugixa.weebly.com/uploads/1/3/4/7/134705556/junawe_fufabuvaw_suleretasefunu_vakabavukejoj.pdfIn PDF document text
    • https://cdn.sqhk.co/diwomijo/7jgjjjb/jaxajizukobolomubeme.pdfIn PDF document text
    • https://cdn.sqhk.co/vavuvalegel/jhDNwhf/exogenous_ketones_gnc.pdfIn PDF document text
    • https://cdn.sqhk.co/jekurona/Kgfggji/889086895.pdfIn PDF document text
    • https://cdn.sqhk.co/wemofisejaf/ROLopwI/tropico_6_nintendo_switch_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/lirerafi/geVcbge/fuzoboruvapakego.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/ravuxudibure/baidu_app_android_china.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/back_benchers_song_punjabi.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/silk_alessandro_baricco_english.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/sinuzameso.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/wopetufutuvupuserufel.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_off0000d6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DB 5848 bytes
SHA-256: 5160f7d36d7ba575d735a4036b04b95f9a1b42d25f1b40c9832afa740f1558ee
font_01_sfnt_off0000eaaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAA 10368 bytes
SHA-256: 2cf032e4e37369aedf23249235fa1365af4906f0ead066bcb2efdc1315343ad1

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