Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dccb1a945addbdc…

MALICIOUS

PDF

72.2 KB Created: 2021-02-26 07:25:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 045b71cb3d4787dcafb551b2625fc5d8 SHA-1: 9d27e77402b681d8e59cc1401d7ef752d3cf9ca7 SHA-256: 0dccb1a945addbdc92c10e2f265c37c8dba5b3ee1f17051a3cbdb1c401f11759
96 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded URLs that likely lead to further malicious content or phishing pages. The document body, though heavily obfuscated, appears to be a lure related to educational worksheets, suggesting a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=put+first+things+first+worksheet+pdf PDF link annotation
    • http://iceteas.space/3_digit_subtraction_with_regrouping_worksheets_2nd_grade2kb6p.pdfIn PDF document text
    • http://esmoney.site/vomuswlwh9.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/what_motivated_european_exploration.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/stevie_wonder_journey_through_the_secret_life_of_plants_album.pdfIn PDF document text
    • http://bigno.space/20640816841qk5zk.pdfIn PDF document text
    • http://dakisemakegag.sportsontheweb.net/avatar_comics_imbalance_read_online.pdfIn PDF document text
    • http://br1.red/what_causes_of_great_depression568p9.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/generac_2800_psi_pressure_washer_carburetor.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sezebepit/61235626710.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/angularjs_interview_questions_and_answers_with_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/vedic_astrology_horoscope_compatibility.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/gerizusogufezowasevo.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/tisaropogex.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/how_to_adjust_bipap_settings.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/pefanasaxenugujifir.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/autocad_commands_in.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/bawli_tared_ringtone.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_off0000ded1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED1 5216 bytes
SHA-256: 9ec38b0fb2a8cad81d4345f0c1a3f8a1a4eb30c914b22cb91359a7eedef006e6
font_01_sfnt_off0000f0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A9 10276 bytes
SHA-256: 12d5bd1dd5f01a99c25c3f2bafb240d3a2a60e2eb780c36284dae7c6681f9f57

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