Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0ce65f945af482…

MALICIOUS

PDF

82.9 KB Created: 2021-03-14 23:03:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e4bfc11b1ef1d83fc3f4efb280ecacde SHA-1: 2c1d4b381bb00b2074a91d8f69b8fd1a066b866c SHA-256: 0d0ce65f945af482f9bc256962fb3f3ee77d190c89fe98213cee057dbcc393ed
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded URLs and heuristics indicate it functions as a link farm, directing users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/wix?keyword=the+crucible+act+4+study+guide+questions+and+answers PDF link annotation
    • http://construt.site/92761030836j53l7.pdfIn PDF document text
    • http://kanshoper.site/java_version_8_linux_installkc2j1.pdfIn PDF document text
    • http://instapriz.site/what_does_the_word_captivity_mean_in_greekx4one.pdfIn PDF document text
    • http://requiremcgood.com/dakesotisuxumutuwax0bwb7.pdfIn PDF document text
    • http://igafnd.org/pozok1l25d.pdfIn PDF document text
    • http://excschool.ru/88937169401rqcyl.pdfIn PDF document text
    • http://vezdesami.ru/chama_chama_new_song_hd_videogl9l2.pdfIn PDF document text
    • http://leaninrzpd.site/sas_survival_handbook_third_edition_the_ultimate_guide_to_surviving_anywhereemh8g.pdfIn PDF document text
    • http://yesitalia.fun/what_is_the_formula_of_speed_of_lightdt0p0.pdfIn PDF document text
    • http://bbbbbbbbeeee.space/walmart_bed_sheets_on_sale4581j.pdfIn PDF document text
    • http://accueilcmb.com/944605139251fbme.pdfIn PDF document text
    • http://allieshouseofhope.com/zumisetemu2k726.pdfIn PDF document text
    • http://nukels.xyz/learn_python_for_data_analysis_freexpd6g.pdfIn PDF document text
    • http://auto-agents.space/31646336729s1j21.pdfIn PDF document text
    • http://com-signto2.xyz/197436663714idqv.pdfIn PDF document text
    • http://itwow.info/gepolutumh1my.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/05f0e10f-ecd6-4fe9-89aa-2cb04a60c05b/linear_algebra_4th_edition_slader.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0360130d-cc81-4817-be23-1cec4d0ad2e7/57094254958.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54e7d35c-6e10-47f7-9336-ea5640dd76b8/what_is_verbal_communication_explain_its_types.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c13437d-d48a-4348-a8bb-c0111ac8edfd/da_de_la_cruz_roja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8264cf6-d72e-4149-b374-6b35b9ed4106/volapado.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_off00010512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10512 5696 bytes
SHA-256: e5f9571cc71b002189f12a6fc2a1237e832ab75fa180ae3af169c50ed347e1b9
font_01_sfnt_off00011879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11879 11084 bytes
SHA-256: e5a134f3bdfb9bd4a38bd0d76444796418493783a8176abd97dd42bc7c0d9f0b

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