Malicious PDF — malware analysis report

Static analysis result for SHA-256 273bbb0373fcea0b…

MALICIOUS

PDF

76.8 KB Created: 2021-06-13 00:35:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b8feff31b22a1d901e1f4bb562963ba1 SHA-1: a9c9bb5e7f6829cb4e4aafe39a2fb7472340b75c SHA-256: 273bbb0373fcea0be9b36a3654c221364fc419c2857951a6622e4371e7887cb1
134 Risk Score

Malware Insights

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

The PDF file contains a link disguised as a movie title, which is a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of multiple external URIs and the 'disposable hosting' heuristic further support this assessment, suggesting the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nomylo.ru/pbw?utm_term=sadhi+maa+jarur+aana+full+movie+rajkumar+rao PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410000/normal_6014033d98281.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419002/normal_60461c3b55ae6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472208/normal_5febf9ae5586c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470226/normal_60c273135064a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379048/normal_602a9b5a42026.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/0ecae153-5aa2-46e4-abd0-ebc0e190ed5f/the_practice_of_everyday_life_chapter_summaries.pdfIn PDF document text
    • http://buxuxeza.pbworks.com/w/file/fetch/145076712/73736567771.pdfIn PDF document text
    • http://nigezid.pbworks.com/f/engcon_ec219_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6571567f-8ca1-443b-9185-9de1586d2cd8/41942840960.pdfIn PDF document text
    • http://vowijeve.pbworks.com/w/file/fetch/144776406/you_deserve_it_youthful_praise_mp3_download.pdfIn PDF document text
    • http://sezipakupuw.pbworks.com/f/lol_mobile_beta_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/544bfa3e-aad3-4809-8724-62866d4ac7ae/how_to_override_speed_queen_washer.pdfIn PDF document text
    • http://bevajuvese.pbworks.com/w/file/fetch/145029273/muvegekefegezo.pdfIn PDF document text
    • http://lokuwulixit.pbworks.com/f/kitchen_sink_drain_plumbing_diagram_with_garbage_disposal.pdfIn PDF document text
    • http://barumena.pbworks.com/w/file/fetch/144460101/musica_gratis_de_los_tigres_del_norte_romanticas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60c0ee81-effe-4896-b109-9cdf682a0a2f/tuxer.pdfIn PDF document text
    • http://fafukite.pbworks.com/f/bowubuka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a1f7d6f-bee3-4cfb-bca6-c085857f3f41/washington_state_basketball_roster.pdfIn PDF document text
    • http://wisarazed.pbworks.com/w/file/fetch/144464538/undertale_full_game_free_download_pc.pdfIn PDF document text
    • http://kiwuwas.pbworks.com/w/file/fetch/144736404/3741137140.pdfIn PDF document text
    • http://jopamedet.pbworks.com/w/file/fetch/144444282/jogupiwabotajaziwujug.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/f/kivanafujobavixuvenaba.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_off0000ed16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED16 5272 bytes
SHA-256: 7e30a32ebbdc152b658321dd5d02969ecee0b4aa5f95d56b548934559a2e4c23
font_01_sfnt_off0000fee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE3 11340 bytes
SHA-256: a359e87b09fb51690ae4c43fb80ba74a51e8e3b812ad26fad1857ead48632df6