Malicious PDF — malware analysis report

Static analysis result for SHA-256 39d149cdbc0d6877…

MALICIOUS

PDF

85.6 KB Created: 2021-02-17 00:49:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f53fbae754fcd7e76051b06dc0cb896b SHA-1: 2e63431cd1d8af4e4326973e69489d51845f1b4b SHA-256: 39d149cdbc0d6877938c968419f01305adcfbeb3c722382d6b13fbba238cc96c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, indicating an attempt to redirect the user to a malicious site. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI are sufficient indicators of a phishing lure.

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://baarspo.ru/strik?utm_term=will+there+be+another+if+i+stay+movie PDF link annotation
    • http://apple-fruit.space/25776573589luqkz.pdfIn PDF document text
    • http://fruitslope.online/jacques_vert_dress_size_guide754ya.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418013/normal_600d6a5a4eba6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448345/normal_5fdcd51e9b913.pdfIn PDF document text
    • http://kdghy.online/300_blackout_load_data_barnesv9trg.pdfIn PDF document text
    • http://kefets.xyz/drunkards_path_templates_free8afaz.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/nelizenejakarug/vakoxataxodi.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/98221754554.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/high_cable_crossover_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/diwidusomewajonukopi.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/vawiwim.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/bukodapekimik.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/medical_definition_of_death.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/export_html_to_angularjs.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/mivofiralejijigujijunodek.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/have_has_worksheets_for_grade_2.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/investigative_report_memo_format.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/boletin_informativo_ejemplo.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001238a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1238A 21640 bytes
SHA-256: 60898249d3c1aee534edf55e60b8be86cdd073e0e0fb6f7fc5f830a27409c193
font_00_sfnt_off0000ec3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3F 5324 bytes
SHA-256: 19a72e6f3caf0dee46a69b03fda47097e0e900d2b6e583d2aefb8a5b60fbcc50
font_01_sfnt_off0000fe43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE43 10856 bytes
SHA-256: be41054df5bb71537b6fa2517ae002c3396bdc4198c0c4d6d1e6719c71afc2af

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