Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c6f1dfff21cb64…

MALICIOUS

PDF

78.7 KB Created: 2021-03-16 08:02:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: f8a4e297713d430e99238b99c97add8b SHA-1: da550272871b19a729d4fdd85ea16de01412e539 SHA-256: 56c6f1dfff21cb64a21cdc535e0e2d4ea81bfe4a695e4fd33e00c07957d38400
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various PDF files. One of the primary URLs, 'https://leonvi.ru/strik?utm_term=the+power+of+one+movie+reviews', suggests a lure related to movie reviews. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/strik?utm_term=the+power+of+one+movie+reviews PDF link annotation
    • http://wiinorama.space/ms_word_to_pagemaker_converter_onlinefbzdl.pdfIn PDF document text
    • http://fenellalucynelle.info/85784175101f7yug.pdfIn PDF document text
    • http://plusstore.pro/manual_de_sumadora_casio_dr-210tmdxqx8.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://s3.amazonaws.com/tedowafomaru/dream_of_the_rood_translation.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/dodomefaneli.pdfIn PDF document text
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_c50fe16670cc4e9a9a01e082988e878a.pdf?index=trueIn PDF document text
    • https://436c154b-1c2d-4c60-9768-ed3a268ef5e1.filesusr.com/ugd/e8e253_b053971d0bbc4fb6abd1e56793463c1c.pdf?index=trueIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_fbcd540a68124aa2b9e18c4ecdce6cf5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/zusujuromu.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/dodie_she_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/44329616764.pdfIn PDF document text
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_a2fff83d52054a80a065a1074ed52913.pdf?index=trueIn PDF document text
    • https://4abf464d-34d5-4c80-8de5-e64f30e04530.filesusr.com/ugd/8b3eb5_6f18a9c569254d46af3f0d2debf19bbb.pdf?index=trueIn PDF document text
    • https://48e5b1ff-25fb-49a4-826b-3ad3f3a15688.filesusr.com/ugd/0d632a_e9261f2855344213afe5f244acba4715.pdf?index=trueIn PDF document text
    • https://1cbf0fd9-62af-4102-a3dc-982f361539e7.filesusr.com/ugd/bfbc46_57f3a29c9ad24c5b853147ae2c64c0fd.pdf?index=trueIn PDF document text
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_527d4465778e45e3a9ff858e1b3b5a73.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/takateg/excel_vba_copy_cells_with_formatting.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/67976291784.pdfIn PDF document text
    • https://1de4b56a-3309-4767-83a2-f1bb1ea7c594.filesusr.com/ugd/a6e5e9_aaa192904342455eba162e07ca34cbfa.pdf?index=trueIn 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_off0000e96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96E 4708 bytes
SHA-256: a33dcfe54608338e12bc1f42d84ee6b08bef561bbd3d953a78afb1be81bfb0b4
font_01_sfnt_off0000f941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF941 10620 bytes
SHA-256: ff0ba0ca7e9d6434cde0d3bd1a9ebb6f4cc71fad402d37c487b9f1a7c9ef8ad8
font_02_sfnt_off00011da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA6 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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