Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb1dcb75c0da568d…

MALICIOUS

PDF

89.9 KB Created: 2021-03-04 04:07:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fc7ad9312f99fd83ad9a3674f48ccd8a SHA-1: d55a1e7bfd764fa4eec9f9013ff418156bb33ee3 SHA-256: eb1dcb75c0da568d3584792f6d5ebaead242897855ee15e487c0c6ed0cd67e33
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the embedded URL and the nature of the heuristics suggest the document is designed to redirect users to malicious content, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/award?keyword=south+carolina+dmv+hazmat+practice+test In PDF document text
    • http://mavpa.fun/permit_test_california_study_guidet3xu5.pdfIn PDF document text
    • http://nenodipemuxok.mypressonline.com/jeep_wrangler_spare_parts_uk.pdfIn PDF document text
    • http://ipoteka.net/69435725217zzbrk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449781/normal_6039af23da27a.pdfIn PDF document text
    • http://startbastar.online/fugupixifukexotelhqio.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417145/normal_603fbd35c75ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458614/normal_5fd10d10a9545.pdfIn PDF document text
    • http://inglassrus.ru/55414804640f5ox9.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/50893050641.pdfIn PDF document text
    • http://reabook.online/8762067069dmv1q.pdfIn PDF document text
    • http://sopisafexuj.sportsontheweb.net/16067854347.pdfIn PDF document text
    • http://urott-hu.com/how_to_take_professional_photos_with_phone_for_instagramssyk6.pdfIn PDF document text
    • http://ital-tess.space/free_chess_ebooks_downloadffu81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387035/normal_60220c9bdeefa.pdfIn PDF document text
    • http://baltika-trans.ru/somasubar8awss.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/sojebelevenex/bryson_tiller_album_true_to_self.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/is_coronavirus_capitalized_or_not.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/kipoxaxuf.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/home_budget_calculator_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/sex_education_tv_series_season_1_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/backlinko_link_building_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/bubib.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_off000122f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F9 5524 bytes
SHA-256: ad803d904edfe07471e4aaafc8c2fb013e0d44fd7d994288c589587de461a584
font_01_sfnt_off000135a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135A3 10592 bytes
SHA-256: 28ba7df9ef7a6d89e3b71383fc4ca79220554469c9d787e6e560aa09db9f4c99

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