Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae9974fa135e31fa…

MALICIOUS

PDF

150.5 KB Created: 2021-03-26 06:52:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 39f5c3476e8eb5b47b3744cb653a7f39 SHA-1: daa4a4d1a7219cf69f101dec0c68d41ff2f5c920 SHA-256: ae9974fa135e31fa734ffc5bd441cabb80277ee57fd5dedbe37128007f751814
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'kuzutuzo.ru', which is likely used to host a phishing page or deliver a second-stage payload. The document body, though heavily garbled, suggests a lure related to 'shorts' and includes metadata indicating it was generated by wkhtmltopdf, a common tool for creating PDFs from web content, further supporting the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://kuzutuzo.ru/wix?keyword=calle+d%25C3%25A1lmatas+101+101+dalmatian+street+shorts PDF link annotation
    • http://yandex-delivery.cc/que_tipo_de_sistema_termodinmico_existen1m0xa.pdfIn PDF document text
    • https://cdn.sqhk.co/pulobegefuzi/guniegh/mazazodaxakodes.pdfIn PDF document text
    • https://cdn.sqhk.co/lenubire/TRjhOFM/yeezy_380_onyx_release_date.pdfIn PDF document text
    • http://jgndegs.info/46431422033nho12.pdfIn PDF document text
    • https://cdn.sqhk.co/sobetevod/jfYDhQV/animal_crossing_new_horizons_daisy_mae_bunny_day.pdfIn PDF document text
    • https://cdn.sqhk.co/sudidoxa/bwFTW48/ps1_emulator_for_windows_phone_10_free_download.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://instgrmmverifiedbadge.com/jadawagufunexipab6m5yh.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://uploads.strikinglycdn.com/files/381f9dfb-94b3-40b0-b45b-32da6aaf05b5/is_the_dodge_3.7_v6_a_good_engine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f429ed0-7de8-463e-8e00-1e1c4083d363/digavimigipapiwigiwapotiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfb14bed-a9a8-40a0-b572-d2ff2511e23b/61166534472.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/manual_do_ar_condicionado_portatil_philco_ph11000f.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0634c14-5a26-4979-85cc-c2686d708e8e/44294658500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ccb15af-fdde-422b-b6e7-02a6b59187d5/adding_and_subtracting_numbers_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dade3e50-d73d-407e-a696-0bddae37a9f1/montblanc_meisterstck_le_petit_prince_solitaire_dou_classique_fountain_pen.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/pexalemejevukovevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1da4a02-4d39-44e4-bff3-4b670c0998c7/conexant_audio_driver_windows_10_lenovo_g580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6ffc548-d479-410f-916a-1d9b0b900d6a/toro_snowblower_chute_wont_rotate.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/canon_photo_editor_for_mac_free.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CBE4 5304 bytes
SHA-256: 46961bd5a47e98a9ffc704790a10390be023a9533a7335382f01b5d3971d14f9
font_01_sfnt_off0001dd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD24 5944 bytes
SHA-256: 7d1177d74ba169c9ff42c6bbf0bc6cfe0bffc6f32e1f20f0eaff4b30b46e60de
font_02_sfnt_off0001f232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F232 17392 bytes
SHA-256: af655a93c8b99a6df1af80999b2d75f298a5921f5c8784a75a924eed2d00936d
font_03_sfnt_off0002253d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2253D 16236 bytes
SHA-256: 313d4e782e14268853a499597fc2b5356d25a606a53efbf1ab38c90987944d5c
font_04_sfnt_off00023a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23A55 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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