Malicious PDF — malware analysis report

Static analysis result for SHA-256 2861b3d1b5cb1e8d…

MALICIOUS

PDF

74.4 KB Created: 2021-03-08 13:40:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2dc73f14656bb2f80dd861a9c0563c24 SHA-1: 643cc773f706dd9f422a6541e3cd441856b42474 SHA-256: 2861b3d1b5cb1e8d72e9ac85b2c048910fdfb45f8a7bd4802e8be7bc157ebb76
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, likely intended to trick the user into downloading a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to an 'economy toeic actual test pdf'. No scripts were extracted, but the presence of external URIs is a strong indicator of a downloader or phishing attempt.

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://xezojetit.ru/123?utm_term=economy+toeic+actual+test+pdf PDF link annotation
    • http://pixidilivutep.medianewsonline.com/enthalpy_of_formation_using_hesss_law_lab.pdfIn PDF document text
    • https://cdn.sqhk.co/soruwere/shfjhia/votigafesafigaf.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/1ojeiey/red_alert_game_for_pc.pdfIn PDF document text
    • http://sebevifa.getenjoyment.net/fuwevimalamuwuzoxago.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/idjjdgx/ritolisobofakobopekafebo.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/96920406938.pdfIn PDF document text
    • http://fulukegoror.getenjoyment.net/virowojuliker.pdfIn PDF document text
    • http://fupemagis.mywebcommunity.org/what_countries_dont_need_to_quarantine.pdfIn PDF document text
    • http://nanebaxexob.getenjoyment.net/1878224643.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5c839259-519f-4cee-a1a2-6639d654070b.filesusr.com/ugd/140efa_ee6eee3a323a459d90db2728cdee0ff0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/day_planner_template_microsoft_word.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/aboriginal_art_symbols_and_meanings.pdfIn PDF document text
    • http://bamemuwibe.epizy.com/geometry_textbook_answers_chapter_12.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/trane_xv20i_humidity_control.pdfIn PDF document text
    • http://xofatodifukox.rf.gd/johnny_b_goode_back_to_the_future_tab_guitar_pro.pdfIn PDF document text
    • http://nebopepebog.rf.gd/85945904580.pdfIn PDF document text
    • https://e942959e-95af-4115-ab05-a6e38533eaad.filesusr.com/ugd/66f7a0_85076d59ab624eb1a70a8884d0276e14.pdf?index=trueIn PDF document text
    • http://fonosatal.epizy.com/guviza.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/tasoxone.pdfIn PDF document text
    • https://c9b0c9dc-51ad-46ec-84b2-dbc26df53712.filesusr.com/ugd/b6f588_68b2b1a1ebf846329edcf745b73c7c9f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/curso_de_ingles_basico_augusto_ghio.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_off0000dff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF8 5264 bytes
SHA-256: d5b23ba306f6ac44b604c5b74b0c6ec7cbc27b6961daa774fb3adb08dfd63f59
font_01_sfnt_off0000f1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DF 14228 bytes
SHA-256: 5b04746770cc3fa563c70c03d0794f69da83b542246465030979aa016a504c9a

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