Malicious PDF — malware analysis report

Static analysis result for SHA-256 59afacef5c5f88ab…

MALICIOUS

PDF

67.8 KB Created: 2021-02-28 22:17:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5f02b7053c0b80f5ab7a11d34d53e081 SHA-1: 7fd87a05b11aed80eae26fef8c939f760ffa1b0e SHA-256: 59afacef5c5f88abe1eb5237947bd9bfff9b363872e5f2645b5e2ddb88b4fead
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://pesudimudoselu.weebly.com/uploads/1/3/2/6/132681392/67c9532.pdf.
  • 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://vilenefex.ru/award?keyword=holt+mcdougal+us+history+pdf PDF link annotation
    • http://jadogaxarabu.mygamesonline.org/15772414484.pdfIn PDF document text
    • http://ladyso.ru/bed_sheet_with_elastic_band_online7b3xs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392237/normal_6022d0a809fe2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474722/normal_5ff80332e4508.pdfIn PDF document text
    • http://kolagozisil.mywebcommunity.org/idylis_air_purifier_filters_type_a.pdfIn PDF document text
    • http://kanijakagiw.iblogger.org/35416462974.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454673/normal_601734ca9dd75.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/computer_networking_a_top-down_approach_amazon.pdfIn PDF document text
    • http://takojebuti.iblogger.org/bolamense_fc_df_bosque_formosa_ec_df.pdfIn PDF document text
    • https://pesudimudoselu.weebly.com/uploads/1/3/2/6/132681392/67c9532.pdfIn PDF document text
    • http://kijorifoweb.22web.org/gumovokakebakujurumisuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pizitibasowu.atwebpages.com/what_does_a_storyboard_do.pdfIn PDF document text
    • http://dixolasafu.epizy.com/how_to_change_wifi_password_motorola_surfboard_sb6141.pdfIn PDF document text
    • http://zefuxaninegug.epizy.com/beaver_scouts_in_france_uniform.pdfIn PDF document text
    • http://favugepotepegal.rf.gd/84094714549.pdfIn PDF document text
    • http://nelevevupa.rf.gd/yamaha_rx_v473_firmware_update.pdfIn PDF document text
    • http://zepenolewiri.epizy.com/maxthon_browser_for_android_free.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_off0000ccc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC4 5632 bytes
SHA-256: 9346706c5f1f3771689a49e4cee823b4d2c551106482bc2ab0de05da9747c836
font_01_sfnt_off0000dfc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC3 10140 bytes
SHA-256: 5bee567218c7ee368b4472a274c54567c23c9d797980f4063e7e91b86c053586