Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad471358ed9e1f49…

MALICIOUS

PDF

84.8 KB Created: 2021-03-28 10:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 895474654c799c4652007f562a7ece15 SHA-1: b712023adc069eea9b6eb337937ab59c9c3f634f SHA-256: ad471358ed9e1f49b12fc9b00f0a2d8f942b976a611128fb682dc14b071e1932
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. One of these links, 'https://soxebez.ru/award?keyword=capitalismo+socialismo+y+democracia+schumpeter+pdf', is flagged as an external URI. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution through these links.

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://soxebez.ru/award?keyword=capitalismo+socialismo+y+democracia+schumpeter+pdf PDF link annotation
    • http://figebofisekozoj.22web.org/barron_s_ap_human_geography_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/32f1396f-a69b-4e8f-8f73-7d796721df83/brother_lawrence_practicing_the_presence_of_god.pdfIn PDF document text
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_1f164f30b02340a09bb8c9a9d0bb74a7.pdf?index=trueIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_2c6d8b50a86347099aa1eed38b5f2593.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fasudikek/5577995704.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/split_head_king_bamboo_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cee94e36-83a7-4294-bcfe-915e0e781dae/what_is_the_meaning_of_the_word_excellence.pdfIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_5a79f43ede9a4b40bb48f34328c74130.pdf?index=trueIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_975f5e981ace43e4881dbe1f3b03c3b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/cual_es_el_libro_de_jaser_segn_la_biblia.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/crystal_report_viewer_version_13.pdfIn PDF document text
    • http://noxikemudenuma.epizy.com/how_to_make_google_my_maps_public.pdfIn PDF document text
    • http://lobusiwogix.rf.gd/kivisine.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/1107328848.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/dunkin_donuts_matcha_latte_recipe.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/17649182342.pdfIn PDF document text
    • https://1f49b3f1-4b09-4f89-88df-03804352fc9a.filesusr.com/ugd/a51aec_32fc0a94eaec4dcaa16ae75775b5f7ed.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/avengers_theme_song_remix.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/bible_dictionary_java_app.pdfIn PDF document text
    • http://jutufevokozal.epizy.com/formato_para_avaluo_infonavit.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_off00010acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACD 5404 bytes
SHA-256: 093b31e1699f4cbfc6ae69d1dda87ca527475b02e6954874fa3dbfee01d7ac31
font_01_sfnt_off00011d05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D05 12036 bytes
SHA-256: 64e57ba28ddc6dcb8b88a6feeb0ec17a17f69e5ef0233c4e6eb6e81d8b243719

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