Malicious PDF — malware analysis report

Static analysis result for SHA-256 f085f05d8f17906e…

MALICIOUS

PDF

82.8 KB Created: 2021-03-13 20:56:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e8578161ef295b798e68be63643307ef SHA-1: 9d6393487751cfb3692dbbef5a81ee9f601ef188 SHA-256: f085f05d8f17906ee0c632acb56ea3838ddac392407e5e0de73a9a10227db60c
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/wix?keyword=showbox+new+version+apk+download PDF link annotation
    • http://lunatan.medianewsonline.com/42463994732.pdfIn PDF document text
    • https://cdn.sqhk.co/wifilivemij/a3q8rid/jidizabufedozidokopa.pdfIn PDF document text
    • https://cdn.sqhk.co/fonowatusopu/jelUidm/53390768546.pdfIn PDF document text
    • https://cdn.sqhk.co/xumobopore/ahjBigS/70496602599.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/HRH3zij/kavadusedowe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417137/normal_600062147e11f.pdfIn PDF document text
    • http://tufofol.medianewsonline.com/d3_js_get_absolute_position_of_element.pdfIn PDF document text
    • http://bewewafip.scienceontheweb.net/93485045148.pdfIn PDF document text
    • http://vavazexowupex.medianewsonline.com/what_is_the_legal_age_for_sexually_active_in_us.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483855/normal_6040f32ae1392.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404725/normal_60157f0f1ca1a.pdfIn PDF document text
    • http://madoxorijegobe.sportsontheweb.net/24422095071.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427793/normal_5feafd258ee1d.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/d55aeb0d-9590-4876-b7dc-7db436775909/dsc_pc5010_programming_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55bae90c-a155-4d61-ae38-3ce67e9be72f/netgear_wndr3300_manual_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb1fcf70-d711-4734-9747-63315f6c71d9/78265872786.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/73266781960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e02e853c-2411-442b-ba5d-b36aafe4f278/how_to_use_rabbit_ears_on_a_smart_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b29b62ed-694c-46df-a2b1-9d6c3b4c7bce/wemumuxoxizabab.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/3550277241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a534cfac-a482-42fe-b754-13ed92ba45c5/los_juegos_del_hambre_en_llamas_pelicula_completa_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/mapa_carril_bici_barcelona_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ad43926-8b6c-4855-9a6e-3f144f79c462/how_to_use_vacuum_seal_rolls.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f4c305b-59f9-4491-b058-581a2364f210/garmin_gps_60_price.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_off000102ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FF 5576 bytes
SHA-256: 4da9a8f5107a01b352a60c53e279a23a0dccb8133fdacad1cd36ef87a083d60e
font_01_sfnt_off000115fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FD 11016 bytes
SHA-256: 01c0fea1f35d57a95e0e5f6e76636c5d0f2663c3188c952f1faa90ea718a04be