Malicious PDF — malware analysis report

Static analysis result for SHA-256 455e727c54ac5269…

MALICIOUS

PDF

77.9 KB Created: 2021-03-25 18:09:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b5e6552154e024d9fa6de92adce48ca7 SHA-1: ce960c502e72a62d82e820b50172a53bd48b2595 SHA-256: 455e727c54ac52691078613b9083689abd69e2bfd9cf1cd96faca6a80dfbab73
136 Risk Score

Malware Insights

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

The file is a PDF that contains a heuristic firing for a redirector link, specifically identified as a 'free-download phishing' lure. The primary URL, https://maypoin.ru/wix?keyword=lyrics+to+cleansed+by+charity+gayle, is embedded and also appears in the document body, suggesting it's the intended destination. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://maypoin.ru/wix?keyword=lyrics+to+cleansed+by+charity+gayle PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4496146/normal_5ff3a7c9d0a7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_6059bc0544e1e.pdfIn PDF document text
    • http://kefets.xyz/zefowikubem61rs.pdfIn PDF document text
    • http://laxana.ru/55136829847izqt.pdfIn PDF document text
    • http://coolvdomaion.online/wodowevr8vaq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402478/normal_5feb37284d00a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444386/normal_602c0e2f31209.pdfIn PDF document text
    • http://ita-fitness.fun/bloons_td_6_mod_apk_xpbl2s1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472213/normal_5fda7cdd781bf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cde2129-0770-4af8-aef6-cb20d8c1d577/30366443072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aea13cc-6d15-4f6b-907b-4d8954acda30/checklist_when_buying_a_car_privately.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/054e4646-5fd8-4a61-804c-11a01e896d07/noven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/630f4a55-0593-42c4-86af-57da297fb152/pgcet_computer_science_books_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b827f33-a627-4f5e-9d01-fabd258f377f/32887581703.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8955e8d8-e47f-4e9b-9bbd-d5825e6a94d1/62126398375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a57fa066-5ca6-4fdb-8ee7-1d427189e3b2/xivodewegokuwelelesuvaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6677bd9e-daf3-4b0f-adc0-d4e06bf096a8/the_game_of_thrones_story_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a5e689b-9083-436f-8175-b2f38e098231/what_is_the_salary_of_merchant_navy_engineer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c92b3720-d264-49d0-a126-56ce805c300d/polo_ralph_lauren_outlet_online_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeddab5b-fe89-47a9-bdb1-358d16a5606c/fixifadubesokujuna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96bcf6a9-201d-4ec3-9a42-ed5a72a64c38/64949974257.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37650709-1d1f-4ae3-8062-c564c77d7394/nileritofujexap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66c24e44-633b-4a2f-abe7-1504242fa78b/pijupomemujafalaxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56a7b750-f3f4-490d-8918-936395833709/research_design_qualitative_quantitative_and_mixed_methods_approaches_creswell_2014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9a5ce33-8592-405d-9df4-3f01d3a13187/tidunof.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1D 5384 bytes
SHA-256: a27a25f8b8c364342a2488f3a4470a5df4820ff9c4f6960ecbeacf40c623f394
font_01_sfnt_off0000ef6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6F 10900 bytes
SHA-256: a28bc2872cb382b10688c42ad9ad7983eb19e423ee9672a441f6e510ffd26a5b
font_02_sfnt_off000114bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114BF 16160 bytes
SHA-256: 25a5e6c7c9cd73e1730f271d334b71b3c0ac6385951e3737251623a68d8eef5c