Malicious PDF — malware analysis report

Static analysis result for SHA-256 28ed558dd9439493…

MALICIOUS

PDF

88.4 KB Created: 2021-04-03 07:03:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e73ffced09402b98c17262d1688ec395 SHA-1: 8fb842312171f970a58fae3bfa240e1481f74404 SHA-256: 28ed558dd94394937da523a05e7fa1ba7fc4bb884eae2c038b5538aef0665cc7
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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/wix?keyword=wind+waker+hd+cemu+fps PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369505/normal_6036655836e3b.pdfIn PDF document text
    • https://cdn.sqhk.co/gixixutiji/jeQobzf/nagozibemufanariz.pdfIn PDF document text
    • https://cdn.sqhk.co/kufalavoxig/iibjhig/67581750855.pdfIn PDF document text
    • https://cdn.sqhk.co/sefibenip/jehjjdG/43264047415.pdfIn PDF document text
    • https://cdn.sqhk.co/ropesuzuruf/ZyYjahc/duwewavopebisukubuwem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476925/normal_600ff9a4c10b9.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/8bc89afb-ac05-4eec-8282-e2cb90e9c453/the_count_of_monte_cristo_movie_review_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/850900f2-cb7c-4550-95d5-4a14f63e0165/77193538656.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef6ff2e4-d989-407c-9d96-39926f310c9d/how_to_clean_cascade_300_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf585add-8423-4d1f-a9f9-cb6ba113abec/22206794328.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/is_the_dark_tower_book_series_finished.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/ninna_birthday_kannada_song.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/74535993338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fab268c-e790-4d49-a8b5-581190925f7d/5939245550.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa4d8e83-7ba3-4b76-93a5-d9fc3d48e9a8/ejemplos_de_las_funciones_logicas_en_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/076f4fbf-5fe4-4810-b2d5-527ecf3e1dfd/pelivokadol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e9aacee-fa8b-488d-8e0f-cbbb4183ac03/tujomujikixibe.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_off000119c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C6 5532 bytes
SHA-256: 8ea09e69c63d1ed1316a9662a0f463e6bce5395cf4bcc8ae91b01069e841387a
font_01_sfnt_off00012c8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C8B 11788 bytes
SHA-256: 6aa2caced001e4a333df23e3a6c7234cb6cc52f0c5ca66cdd3550c5e539a977e

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