Malicious PDF — malware analysis report

Static analysis result for SHA-256 27d827fbdf89f40e…

MALICIOUS

PDF

75.3 KB Created: 2021-02-24 14:14:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 249d5f19abfb02e0d5a6d4491a861cd1 SHA-1: 1e8f0464bfcc0556864c4503a38279d6aa177933 SHA-256: 27d827fbdf89f40ee003f2f5ae30e943fb9a2edd2f54327ab29d6069c61cfc9e
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 an attempt to lead the user to a malicious site. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URL are indicative of a phishing or malware delivery 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
  • 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://yafferge.ru/award?keyword=do+all+oral+b+brush+heads+fit In PDF document text
    • http://rarafon.iblogger.org/sebunijatutemiwutop.pdfIn PDF document text
    • http://karaulovlife.site/xiririsefumuls36v.pdfIn PDF document text
    • http://islandlandscapesbb.com/rakinudovukejunine8e7.pdfIn PDF document text
    • http://psychologyrelax.xyz/how_to_prepare_for_swat_interview92ahk.pdfIn PDF document text
    • http://sevisotesasare.iblogger.org/wosomisolipunov.pdfIn PDF document text
    • http://top-shop-store.website/devasowuv6h5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/ximupuv/bitlord_0_speed.pdfIn PDF document text
    • http://moxurux.epizy.com/pematedefizuvuko.pdfIn PDF document text
    • http://mifawebof.epizy.com/68374275970.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/call_of_duty_mobile_file.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/going_bad_piano_sheet_music.pdfIn PDF document text
    • http://parakotevetit.epizy.com/wabokipulaj.pdfIn PDF document text
    • http://dujepuxa.rf.gd/19874291199.pdfIn PDF document text
    • http://bixivanudupona.epizy.com/jupadinijojamamos.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/graphs_of_rational_functions_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/wakiniwadutafofiratinas.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/apset_online_application_form_2018.pdfIn PDF document text
    • http://fujuresaw.epizy.com/bully_game_for_android_compressed.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE26 4912 bytes
SHA-256: 788b1561644776e926a400db2cf0691a8bda5dedb059dad0c7e384c0daedd6e0
font_01_sfnt_off0000eee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE8 10156 bytes
SHA-256: 0d073e13c0e5d6e7ba3fec81bc553f81dad2686f882be9fd21a24ac6bf3dd651
font_02_sfnt_off0001119b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1119B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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