Malicious PDF — malware analysis report

Static analysis result for SHA-256 57ed604062d3c289…

MALICIOUS

PDF

80.3 KB Created: 2021-04-07 19:13:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3f134900bc165d259e3f9a044a3e17b4 SHA-1: 514a3a4be525f30811caa0cb176c2f27ebb209ed SHA-256: 57ed604062d3c289d76c19fba1f18ee94cb35f3b383136e2b9f7939d2b775183
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely using embedded JavaScript to facilitate the redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://soxebez.ru/strik?utm_term=is+there+a+prayer+for+anxiety PDF link annotation
    • http://jonipifenukiz.mygamesonline.org/69119095403.pdfIn PDF document text
    • http://sokegex.mywebcommunity.org/ielts_listening_test.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/bojeviladopuvu.pdfIn PDF document text
    • https://cdn.sqhk.co/votijavos/8yjdaid/download_f1_mobile_racing_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/rewakevutel/sQhj0gg/my_pillow_reviews_mattress_topper.pdfIn PDF document text
    • http://pusewuvi.medianewsonline.com/dell_xps_8300_power_supply_upgrade.pdfIn PDF document text
    • https://cdn.sqhk.co/mejiwimuza/jjgc3jf/business_resumption_plan_development_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/digiwejasipu/0ihoyxf/16617385253.pdfIn PDF document text
    • https://cdn.sqhk.co/datimemovuko/ghBe5gi/ledobuwi.pdfIn PDF document text
    • http://rakadan.sportsontheweb.net/vivinib.pdfIn PDF document text
    • http://tozemudezajif.mygamesonline.org/mirenivaremofovogedires.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/mesixadelomomo/66210066507.pdfIn PDF document text
    • http://xigesema.epizy.com/evaluatepharma_world_preview_2018_report.pdfIn PDF document text
    • http://padusij.onlinewebshop.net/kutopasufegesixeguta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d169e014-05b3-4447-a732-647400d1d365/farilokovazobarezi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2a19e94-2b85-4013-90a2-36922db4acda/68635046037.pdfIn PDF document text
    • http://xusexupilaru.epizy.com/company_logo_design_cdr_file_free.pdfIn PDF document text
    • http://xepalufozakot.epizy.com/pupib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0a37164-892b-4370-bb75-8d05327365d0/what_are_some_reading_comprehension_strategies.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/free_printable_2nd_grade_math_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/gordon_growth_model_excel_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21e9f4a8-2d82-4f95-9d37-fb8f88b45bb6/59862219651.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/vosanujazuwumasivido.pdfIn PDF document text
    • http://buvelijixuzumu.epizy.com/roxitobipuvesupu.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_off0000fca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA1 5064 bytes
SHA-256: c7959e9673e608732ab3e0c96321937b3af1952fe2246f77d4948e6bcc8218a9
font_01_sfnt_off00010de7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE7 10996 bytes
SHA-256: 237a50a2dfcc73c472f280a13599e009f46f3437c36a3a679b40ea598d2c2e33

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