Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b2cab5542e1512d…

MALICIOUS

PDF

84.0 KB Created: 2021-05-03 13:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 521f6d2fbfb903d8d868ee91b01af1a0 SHA-1: f5ba2d13601e7de3027cecb7dbaaf18dbefa74d2 SHA-256: 5b2cab5542e1512dcdb6d87a68e4941b4def30bcbb585691b7e0d0c26fd60083
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, masquerading as a search result for a sensitive topic. ClamAV and ML classifiers have identified this PDF as malicious, specifically a phishing trojan. The presence of embedded URLs and the nature of the lure suggest an attempt to direct the user to a malicious site for further exploitation.

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://xajibur.ru/strik?utm_term=darlie+routier+dna+results+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419225/normal_60604f5f7a040.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449205/normal_5ff4e05a9fb88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482617/normal_6036fb207296a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368736/normal_5fe2c894afb38.pdfIn PDF document text
    • https://cdn.sqhk.co/sifolilo/sOicVjg/wofizoxowobenolabenatanim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402710/normal_6041173fc14e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469136/normal_606b6c0bc2915.pdfIn PDF document text
    • https://cdn.sqhk.co/kululojilo/7ETPLVr/game_dev_story_combinations_unlock.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/Dhigihf/sejebigew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421207/normal_6019c7a05e4bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486197/normal_6014680c4f660.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/3e778b15-e39a-4c7f-bad2-c191f308aa1f/83397290220.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcc77141-edf5-4c3a-8591-9a1dfd09e26a/simple_past_tense_worksheets_for_grade_3_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9e2b2fa-7bc6-44ce-951d-0a0bc835c9ab/day_by_day_armageddon_beyond_exile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00f6e24f-785a-4a6a-95ad-d99f470a1d31/best_online_english_grammar_learning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6769e400-3f09-45d4-83f8-badcfd106d2c/elements_of_statistical_learning_solutions_chapter_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9555d234-0d3b-45f5-a07c-043f2e74550d/how_to_write_irish_address.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dc42b21-727d-4058-9b25-cf900d11165c/fifty_shades_of_grey_full_movie_hulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b55eddf8-a9f5-4213-9337-f0c5128578fd/tevubodapuvo.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_off0000f682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF682 5300 bytes
SHA-256: d71820aaa00a6e70408a22d60d1e302c475c3c7bc43fd2e2b4dc7ce96d55f1eb
font_01_sfnt_off00010896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10896 10956 bytes
SHA-256: 1d385e5cae1d2c0b2ca96d054313da0ed90c398dac46910785b4707def838c22
font_02_sfnt_off00012d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D89 16144 bytes
SHA-256: 764fe263e68fd20aff2bbd96e69f5a400d440299d02096befa162391f913c7cf

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