Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d4c96d19560579f…

MALICIOUS

PDF

77.2 KB Created: 2021-03-23 11:46:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a5979d1344de1c4658fd32afe7a872f8 SHA-1: 285e260f0404b6cca0253ef18dda59f7554e2480 SHA-256: 4d4c96d19560579f8a7b49c4132c842999a96c136726a624decc44c8fc879bde
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and a machine learning classifier. The document body, though heavily obfuscated, appears to be a lure related to 'behavioural theory of management pdf'. The presence of external URIs suggests an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

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://ponafet.ru/award?keyword=behavioural+theory+of+management+pdf PDF link annotation
    • http://vuwimoxit.mygamesonline.org/artaud_van_gogh_el_suicidado_de_la_sociedad.pdfIn PDF document text
    • http://sayfelengs.space/refofopikitokepuxageyru53.pdfIn PDF document text
    • http://streichpack.online/acog_gestational_diabetes_guidelines_2020yyhee.pdfIn PDF document text
    • http://trydouche.xyz/118541106359a9au.pdfIn PDF document text
    • http://dumigegin.medianewsonline.com/silk_alessandro_baricco_english.pdfIn PDF document text
    • http://vatidenow.medianewsonline.com/18234434636.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/siwixomudit/pokuxeratukotoge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf1a94d6-2465-48b1-aa58-b9955b5b93ae/french_vocabulary_quiz_advanced.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/montgomery_ward_sewing_machine_model_30.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/wedding_budget_spreadsheet_ideas.pdfIn PDF document text
    • http://zosajaxuv.epizy.com/63220457597.pdfIn PDF document text
    • http://tumezubix.epizy.com/pefapaliliwop.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/46923373270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69a9fe55-02d6-4573-94a1-885502b0668c/light_sweet_crude_oil_price_forecast.pdfIn PDF document text
    • http://lesupaj.epizy.com/16930765107.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/reroj.pdfIn PDF document text
    • http://muporomeg.rf.gd/mulagumowizemovajubizo.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/tofizoniwelonafoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a07d5b4a-4c2c-44ce-9c11-7044d03ee4dc/vadakitabuzanawuwurelevar.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/turner_classic_movies_app_android.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_off0000f04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04F 5488 bytes
SHA-256: 12c7675c53c0b4eb75531010c61114e676de3e698952cee70cfa111ed65b10c7
font_01_sfnt_off000102e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E9 11052 bytes
SHA-256: cdd970926c35cb1e72965bc26c83749c89f3e75365bd8d2a8fe2ee57a3bb3711

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