Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9fa2514830bfdc…

MALICIOUS

PDF

70.7 KB Created: 2021-02-07 08:19:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 8b5db2e1b8f73a1e3cb303a8201ba152 SHA-1: eeb76a3175fbae3cb2cfa425d17b398bd2f32226 SHA-256: ed9fa2514830bfdcec74fb62595e0edaef4a23df799f38a4ae15de5d74f7090c
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, suggesting it acts as a lure or a downloader for further malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, often associated with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=business+glossary+template+excel PDF link annotation
    • https://fifiruzi.weebly.com/uploads/1/3/0/7/130775727/zenixuv_lorozofigov_koteza.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/cshbhig/93885964583.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385021/normal_601ec0456032d.pdfIn PDF document text
    • http://proita.fun/literary_devices_in_the_crucible_act_29ttdb.pdfIn PDF document text
    • https://cdn.sqhk.co/rivitovolu/ibNcySm/vidiq_plugin_firefox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386851/normal_60190e5d20243.pdfIn PDF document text
    • https://cdn.sqhk.co/kewexezaviz/Xvjijgs/mannequin_head_3d_model_free_download.pdfIn PDF document text
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/zuguwupeb_rugofaxuzujafuz.pdfIn PDF document text
    • https://kumobavogi.weebly.com/uploads/1/3/2/3/132303339/425cb014e79.pdfIn PDF document text
    • http://umniashka.ru/12202567720vxvcp.pdfIn PDF document text
    • https://nobasaxekomu.weebly.com/uploads/1/3/5/3/135322761/ddf4bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447647/normal_6003dcb65640f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nejowubixulifud.rf.gd/tasks_report_template.pdfIn PDF document text
    • http://vutilunero.rf.gd/whatsapp_for_nokia_5233_free_mobile9.pdfIn PDF document text
    • http://kidaxuv.epizy.com/appleseed_ex_machina_mp4.pdfIn PDF document text
    • http://zigubogujivo.epizy.com/mireferob.pdfIn PDF document text
    • http://tezipibuboxigo.epizy.com/scert_science_book_class_9.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_off0000d791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD791 5472 bytes
SHA-256: 69929a194733469728cf8e4a60bb8b78122976f121b5775c5c54a62b384f4535
font_01_sfnt_off0000ea2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2A 10424 bytes
SHA-256: 123bcb9b1397939e6078a36346a59796a125fe7a009c67c55675206b5a15ab95

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