Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c1c39d9fc2207d…

MALICIOUS

PDF

92.0 KB Created: 2021-03-05 19:56:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 18415af5ffbb8ccc2d27844e0cadbf84 SHA-1: c7a7a0d2e29f1fbe5d33192b12869e037efac432 SHA-256: 71c1c39d9fc2207d6a221ba1780e93688b564bac5884c904bef82a274f176efc
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL disguised as a search result for a movie. This URL, along with other suspicious URLs found within the document, likely leads to a phishing site or a malware download. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically classified as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://leonvi.ru/wb?keyword=don PDF link annotation
    • http://lozhobelir.space/linear_inequalities_worksheet_kutaivsmr.pdfIn PDF document text
    • https://cdn.sqhk.co/biwizalibe/SHjhgjc/two_examples_of_community_in_ecology.pdfIn PDF document text
    • https://cdn.sqhk.co/xurajalijok/ijdwcie/lamano.pdfIn PDF document text
    • http://barashik.space/51750604399a35ye.pdfIn PDF document text
    • https://cdn.sqhk.co/nugizape/Aibjapn/gun_builder_custom_guns_shooting_range_games.pdfIn PDF document text
    • http://cosmosqrab.online/tewurevulofeduxuxawakexab3e.pdfIn PDF document text
    • http://idem-peshkom.ru/nupejidexrb6t.pdfIn PDF document text
    • http://hookup666.site/semanekimepopivajibuvipepg1bko.pdfIn PDF document text
    • http://telgrm.site/is_love_in_the_time_of_cholera_a_classic41r5v.pdfIn PDF document text
    • http://naturka.space/82701995661cq7h5.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzonabudad/qBic4rb/16796432082.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/540a2a20-4883-47f8-86be-0d0043b856a0/preparing_for_marriage_dennis_rainey_review.pdfIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_762ffff631984f43a3a4c369a07d7cc9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a31a3583-147c-465b-ad40-4bf163f3850f/systemverilog_for_verification_free_download.pdfIn PDF document text
    • https://e905e09d-7ddd-4aab-833c-73500e817873.filesusr.com/ugd/f4c08b_21f821fe57c340d2af16e551b1f4e798.pdf?index=trueIn PDF document text
    • http://bunakakivukutus.epizy.com/narasimha_naidu_cinema_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7522e1da-d959-438e-b78c-b63b5a9452a3/louise_hay_guided_healing_meditation.pdfIn PDF document text
    • http://jepisaf.epizy.com/58750530713.pdfIn PDF document text
    • http://filopatoj.rf.gd/splash_screen_with_animation_in_android_studio.pdfIn PDF document text
    • https://e209d09f-5af8-48a0-acfc-72d03e9bea0d.filesusr.com/ugd/946fcc_31cfbbd387d1477b96441d0b05ef5c63.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/97dab9cc-55c5-45f0-832e-48f5ded0bb1c/is_baofeng_a_good_brand.pdfIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_86823575faa241e28731363467bcd649.pdf?index=trueIn PDF document text
    • https://9a60fab3-6fb0-4be7-9305-b2e3cc44d963.filesusr.com/ugd/811c4f_bf0b13ee108b4d739de2dbd6c197bc2e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/12ca2e88-59ae-4d46-8fd9-d154cb8d6850/96796090.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_off00012b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B94 5396 bytes
SHA-256: 64e8525faa76a3984018ab628ee5f1f1a9c70baa4a33af70461ec642831a7891
font_01_sfnt_off00013df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DF5 10552 bytes
SHA-256: b098b79e2312d3f230e02f5beca24dc8feb5df23e53ff68d4f8bc4a37606f293

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