Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5e24ca62ecde920…

MALICIOUS

PDF

77.6 KB Created: 2021-03-22 19:54:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a720bc58df40734b600bc061f42852f SHA-1: 28351836f7b1077f4a69464029042c9fe1e0559e SHA-256: c5e24ca62ecde92070c49452bf090da277520dd351c45d8452d081c7ed96ee96
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a link farm and an embedded URI pointing to 'resalured.ru', suggesting it is used for phishing or malware distribution. The presence of numerous external links, many pointing to benign PDFs, indicates a potential SEO poisoning or link farm tactic to obscure the malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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://resalured.ru/wix?keyword=delta+missing+baggage+receipt PDF link annotation
    • http://vuroxinizona.scienceontheweb.net/44951565891.pdfIn PDF document text
    • https://cdn.sqhk.co/zidulibu/iezhcib/xbox_one_x_release_date_price.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/what_is_the_average_income_in_the_us_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/divekezor/n5VXGig/cambridge_english_for_engineering_tests.pdfIn PDF document text
    • http://vaxisezawoged.scienceontheweb.net/how_to_tell_when_to_pick_sweet_potatoes.pdfIn PDF document text
    • http://bonozowibewoz.mypressonline.com/duratinebivilof.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/vitelitubovuluj/requirements_to_get_an_arkansas_drivers_license.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/b_r_automation_studio_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20c73985-e0d9-4f47-82bb-bbab4aa6a361/mipivijetuzifiliwoxuloguf.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/michigan_child_support_general_care_support_table.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70f96eb1-f230-4466-aa5d-d68cf2d7c2f4/12988772367.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/alcatel_30._25_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/712a4879-f23e-4497-a737-9c8ca614099b/eureka_boss_smart_vac_4870_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/angularjs_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/cg_vyapam_pre_ded_model_answer.pdfIn PDF document text
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_2f36bef7ad0644729b741b3293b05ef4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/liluvad/from_streaming_sites_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/809ff362-183b-46ca-aa1f-efa638cd5a60/gipawevezal.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/vosufafarakazoje.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/hugo_boss_orange_jacket_size_guide.pdfIn PDF document text
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_92a8c7c62ca441419b639ebd44562ad3.pdf?index=trueIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_5678b6ebb1ab4a8cb10e40e2b1e281a9.pdf?index=trueIn PDF document text
    • http://bagugexasorip.myartsonline.com/govasosokovepativ.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_off0000f0be.bin
485ba4db753ffd21045259c388a2a5fb6bdd8737275d9080e25078b8228e956d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BE 5392 bytes
font_01_sfnt_off00010304.bin
cb5423df77c5d6be9b2d7d06f99434ea185057ccdcae486f5a163e9ce9c774d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10304 11120 bytes

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