Malicious PDF — malware analysis report

Static analysis result for SHA-256 2518e03ade03aa65…

MALICIOUS

PDF

94.6 KB Created: 2021-03-18 07:40:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 168caba3cede22fc8209cb6cbbd46f17 SHA-1: e6b4052c37d5193760b4afc84e4b615adedd514e SHA-256: 2518e03ade03aa6585c1453aace504c16bc84bd4d8902562edac1f2e06ecabd3
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'zajinet.ru', which is suspicious. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/wix?keyword=egg+drop+challenge+worksheet+pdf PDF link annotation
    • http://viniveba.mywebcommunity.org/why_is_my_zanussi_tumble_dryer_not_heating_up.pdfIn PDF document text
    • http://jiwimejikigigu.mywebcommunity.org/cambio_climatico_en_guatemala_2020.pdfIn PDF document text
    • http://vexetifiridik.mypressonline.com/tifijakalufuru.pdfIn PDF document text
    • http://successinyourlif.website/84550409795rv4pr.pdfIn PDF document text
    • http://jakusavu.sportsontheweb.net/balsamiq_wireframe_tutorial.pdfIn PDF document text
    • http://vivadoctor.ru/today_fm_d_is_s_wrong_answersn9f5u.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/83b6e408-a355-4d9b-8125-b20e87758268/hampton_bay_ceiling_fan_remote_control_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0368787-6de2-440c-b14e-bf06d4504f73/the_magic_school_bus_books_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/36525577436.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/mandated_reporter_form_illinois.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28b312cc-fb7a-4869-9ade-8083e0c1b7c7/61878529496.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/advantages_of_computerised_accounting_system.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/husqvarna_automower_315_installation_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/79947681862.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb2f3fa-b249-4698-92d6-343e438be624/bank_5_fairhaven_hours.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/ford_mustang_mach_1_1969_price_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/39118456587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5d2f9f6-c3d1-4b03-b6c3-1bfbd91cf587/64888476996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14aa78da-b7e3-4529-bd9c-a14884b26607/kumolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05bc4f82-5bda-4b02-a445-cf637a381359/wasanokojogemig.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/edgenuity_answer_key_english_3.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_off00012467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12467 5268 bytes
SHA-256: 990c9994fe8fa3b1dbab7860049142ed947077886ae17a2f535c271515a0804c
font_01_sfnt_off0001365b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1365B 11392 bytes
SHA-256: 7d532990e622b454e073d015e91e62eb2a80b4a7ef7bbabaa483962fcd8bd8de
font_02_sfnt_off00015d0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D0F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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