Malicious PDF — malware analysis report

Static analysis result for SHA-256 07bb5f1a1cf47f18…

MALICIOUS

PDF

73.5 KB Created: 2021-02-18 13:47:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9d4eecd7f242ee47e944d53478972d63 SHA-1: 2e9653c5eb52c0f095e384fbc4b650848aad9ffc SHA-256: 07bb5f1a1cf47f18e4428a2a8fb1440d583a1ca03821d625108c301876a6bea1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to suspicious domains, indicating a likely attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, with the embedded URLs likely serving as lures for phishing or malware downloads. No scripts were extracted, but the PDF structure and URL heuristics are sufficient to infer a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=unblocked+games+7676 PDF link annotation
    • http://testvvd.xyz/wokogudijozy5qv.pdfIn PDF document text
    • http://strgb2.ru/sto_perigiali_lyrics_englishcbvii.pdfIn PDF document text
    • http://cloudmarket.website/devoir_svt_4eme_mouvement_des_plaque3o5zi.pdfIn PDF document text
    • https://worowisirokisid.weebly.com/uploads/1/3/4/8/134856274/xelitir-jemedabuxez-bajolalajaf.pdfIn PDF document text
    • http://usersonlineguardingsettings.site/xopoxowhi8yx.pdfIn PDF document text
    • https://cdn.sqhk.co/nadipozow/9niexTD/30706177852.pdfIn PDF document text
    • http://ch-redirect.icu/repezutikikajunojusavororiosmf.pdfIn PDF document text
    • https://bugagage.weebly.com/uploads/1/3/5/3/135330359/6502d.pdfIn PDF document text
    • http://taygerr.com/manual_calculadora_texas_instruments_ti_30x_iis_onlinesiidy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/breeding_ornamental_plants.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/97654177056.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/set_top_box_android_aliexpress.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/21363472773.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/biogeographical_region_of_india.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/mathematical_finance_books.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_off0000e3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E2 5592 bytes
SHA-256: 2cbcaa1083e881ff70fa122f3fca0f2871aff9b7fc211b6b209003cdf8069807
font_01_sfnt_off0000f6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E3 10160 bytes
SHA-256: 6599de9c576e5f2f5afcb8dff810b7a412d24e7a4e4d3ef3e16caea8a58ad25b

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