Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5489e728dcd3b97…

MALICIOUS

PDF

80.0 KB Created: 2021-03-21 00:06:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 47f41254e263b07c0ef1a090dd5c203e SHA-1: 08b5ede3f174814dc25261f520a7425798d44725 SHA-256: a5489e728dcd3b971fccde9b127b96fb76edb40ede2594ebe6c54a08a14de277
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body is heavily obfuscated, but the presence of the external URI and the ML classifier's high confidence score suggest malicious intent. No scripts were extracted, but the PDF structure itself is likely exploited to deliver a malicious payload or redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/wix?keyword=jeep+liberty+manual+transmission+fluid+change PDF link annotation
    • http://yourlivehelp.com/un_tubo_de_cobre_tiene_un_volumen_de_0.009_m3_a_10_c_y_se_calienta_a_200_c7v9ns.pdfIn PDF document text
    • http://autokenn.com/roger_black_exercise_bike_e2_error253vc.pdfIn PDF document text
    • http://baby-slings.ru/aha_bls_test_version_a_2016at56o.pdfIn PDF document text
    • http://wirelessinfo.ru/voweduwisukefedijadisw4s8v.pdfIn PDF document text
    • http://sodaapp.pro/what_is_the_3_day_epic_experience60p7m.pdfIn PDF document text
    • http://sk-anker.ru/71777225441fzsxd.pdfIn PDF document text
    • http://ighelpcenter.xyz/28889511020wxavo.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/zakunafu/jewellery_website_templates_wordpress.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/hotel_reservation_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/nasitevu/wegofepajoxinisukobodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3321bc15-4aa5-4234-9fff-d4622e15bf5c/49624265515.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/nodib.pdfIn PDF document text
    • http://pojinagogaj.rf.gd/data_structures_and_algorithms_programs_in_java.pdfIn PDF document text
    • http://vusezozoxegakin.rf.gd/the_wrath_and_the_dawn_book_2_summary.pdfIn PDF document text
    • http://tuduresoxafu.epizy.com/zefugagumenepujatatuwej.pdfIn PDF document text
    • http://kititone.epizy.com/learner_centered_approach_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15d110b9-6e29-412b-9669-96e438b45a39/mebalowemokeduzajowi.pdfIn PDF document text
    • http://sulorowanutabu.atwebpages.com/lepenijosojofejasorixofam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f9d2dc9-f89e-48c0-ad0d-90fed8c9afb5/the_nature_of_code_by_daniel_shiffman.pdfIn PDF document text
    • http://wipadafefuxasi.onlinewebshop.net/livre_avoir_confiance_en_soi.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_off0000ed88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED88 5684 bytes
SHA-256: 2fe319ecdf7e8b6206c6bbe8366788370a55147bd4cf53829e24c8ccb9e13d6e
font_01_sfnt_off000100a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A1 10296 bytes
SHA-256: c45ab636473ac1f8b9345b5e4b6a96a710ed1208611cb978fc618c7b28b66570
font_02_sfnt_off000123c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C5 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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