Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de88fe2ecc2ca76…

MALICIOUS

PDF

75.5 KB Created: 2021-02-26 21:27:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: a8041bd08fbb31d5a4ab5f3829c805ef SHA-1: 0977c1b6b9a25d165c126a7aa8b9f756d24d98e6 SHA-256: 3de88fe2ecc2ca76bc67117c25478dd1765a394a9cf7c46a6fe5aa2d439eef03
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically appearing as a search result for a technical query. Heuristics indicate it's a link farm on disposable hosting, and ClamAV detected it as Pdf.Phishing.Trojan. While no scripts were explicitly extracted, the PDF structure and URL distribution strongly suggest a phishing or redirection attempt. The ML classifier also flagged it with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jumiwimov.ru/award?keyword=why+won%2527t+my+external+speakers+work+on+my+computer PDF link annotation
    • https://cdn.sqhk.co/wijelukifap/kNgciJI/u2_greatest_hits_song_list.pdfIn PDF document text
    • https://cdn.sqhk.co/vupapevixu/Tjg4Rhf/slicer_knife_size.pdfIn PDF document text
    • http://dafilor.iblogger.org/61020009084.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/fhh0ghq/infinity_pool_near_metro_manila.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/tevilafojafujazikosezex.pdfIn PDF document text
    • http://gudijogorirew.iblogger.org/sovam.pdfIn PDF document text
    • https://cdn.sqhk.co/zebimapajod/jbugeSy/multi-_currency_cards_conotoxian.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duwutejuvozow.rf.gd/bharat_movie_filmywap._io.pdfIn PDF document text
    • http://kemasun.rf.gd/89102099384.pdfIn PDF document text
    • http://linanimeb.rf.gd/andrew_jackson_nullification_crisis_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/audit_report_format_in_word_2018.pdfIn PDF document text
    • http://jekowatu.epizy.com/nivifisupetagi.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/5th_grade_math_practice_book_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/28680385017.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/79390849947.pdfIn PDF document text
    • http://lefivagalowo.rf.gd/anjaana_anjaani_full_movie_720p.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_off0000eaa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA3 5544 bytes
SHA-256: 4cbcd20ead50af4ebec88537d82c5d6c845e008bb0a2018806caf8df51b5f56e
font_01_sfnt_off0000fd7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7B 10264 bytes
SHA-256: 2fc5a1ab64823f4eb898f6ae26ffd8dcbae86d90989115e691f06a42e538fdb3

Open this report in the interactive analyzer, or submit your own file for analysis.