Malicious PDF — malware analysis report

Static analysis result for SHA-256 28e9ac99cc0391cd…

MALICIOUS

PDF

91.5 KB Created: 2021-03-22 10:26:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 998158ac0d030b690e5e41ef346694b4 SHA-1: df0885030ff08ab95e603e24012bc888ce462fce SHA-256: 28e9ac99cc0391cd72e54666d7cb501a58613746898d34d7dbbfd296323ef65b
126 Risk Score

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 phishing attempt. It contains numerous embedded URLs, with one specifically pointing to 'maypoin.ru/strik' and a query parameter suggesting a lure related to CCTV cameras. The PDF's structure and the presence of many links suggest it functions as a link farm designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/strik?utm_term=are+swann+cctv+cameras+any+good PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4501204/normal_5fc5b3bceb850.pdfIn PDF document text
    • http://ridaxaki.mywebcommunity.org/fitanaxizozexiwesibibag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370063/normal_600a1c25eaa28.pdfIn PDF document text
    • http://pejokepi.mywebcommunity.org/gasewovotajekanuwoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484370/normal_5ffe0bcc18b21.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/health_and_physical_education_class_11_vk_sharma.pdfIn PDF document text
    • http://mekomob.getenjoyment.net/37892956902.pdfIn PDF document text
    • http://mobutadaxez.medianewsonline.com/free_fiberglass_boat_building_plans.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/sims_3_expansion_packs_download_mac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490122/normal_6049b7f9b6392.pdfIn PDF document text
    • http://rumepado.mypressonline.com/11975243880.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379487/normal_6011cdcdcc0b3.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/14587577869.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
    • http://zubiluwetij.myartsonline.com/tipuritodunubosinubel.pdfIn PDF document text
    • http://wukevivetarapu.myartsonline.com/the_fault_in_our_stars_book_quotes_with_page_numbers.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/27188055742.pdfIn PDF document text
    • http://woranuganavot.myartsonline.com/22873193740.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/5101460951.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/number_the_stars_vocabulary_activities.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/garmin_forerunner_305_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/all_chinese_characters.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A08 5208 bytes
SHA-256: 3b269a078b754f8c5adf60c52fff28844c02371b253c29c28ff004a0a04fbd7f
font_01_sfnt_off00012bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB3 11380 bytes
SHA-256: bb85dd60418482b74a4013dba2a5a0e13a078ff3da7143b621bcebfbff08565e
font_02_sfnt_off0001525d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1525D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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