Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd99129eef918ecf…

MALICIOUS

PDF

66.2 KB Created: 2021-05-23 06:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7d60de56412909b621b15d0657976a34 SHA-1: 69ad939b9ada26a61f2715e6f3c4755be5e09e81 SHA-256: bd99129eef918ecfbf4b49ceaae761f61f77f29aa61f031c715d3f203e05280d
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains an embedded URI pointing to 'zajinet.ru', which is likely a malicious domain used to host phishing content. The document body, though heavily obfuscated, appears to reference 'Frozen 2 arendelle castle dollhouse', suggesting a lure to attract users to the malicious site.

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://zajinet.ru/strik?utm_term=frozen+2+arendelle+castle+dollhouse PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412160/normal_600723e4d6d02.pdfIn PDF document text
    • https://fefaxunitu.weebly.com/uploads/1/3/4/3/134399706/33e66f7e.pdfIn PDF document text
    • https://gabejopow.weebly.com/uploads/1/3/4/5/134597712/lusizagi.pdfIn PDF document text
    • https://zadidiboz.weebly.com/uploads/1/3/5/2/135295834/2c9a72472.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/2409918.pdfIn PDF document text
    • https://jewesorovusupim.weebly.com/uploads/1/3/6/0/136092124/fateluwafi_zixijasemot_debiko_bamuraxozolowe.pdfIn PDF document text
    • https://debosuvulodek.weebly.com/uploads/1/3/1/0/131071041/pagisewa-xodabezud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368777/normal_5fefb3976606c.pdfIn PDF document text
    • https://feronodi.weebly.com/uploads/1/3/0/8/130813799/05db9f13724e.pdfIn PDF document text
    • https://gabejudunutulan.weebly.com/uploads/1/3/4/8/134887900/493eca7ee2e534.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/ea5eec23-8757-4b7d-a4dd-90541699c857/40838409927.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/imagenes_de_rostros_de_diferentes_emociones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50c676a8-ff16-4e49-a553-4e049ac5a182/can_you_use_interfacing_for_masks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77b917dc-7dad-4b27-a833-773d7646c03e/how_to_do_the_mean_median_and_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/887664a1-a368-4eeb-95ff-49c6f6ebc4c6/how_to_grow_lettuce_from_plant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3f3bc81-8981-4a47-aa01-685792bc2dd6/99500853927.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/bncc_educao_infantil_2019_em.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a39430f9-72f5-43b1-aff1-c6c4652beb7a/eotech_512_vs_552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4adbe41-2b1d-4b9e-982b-7004da27106d/whirlpool_thin_twin_panel_removal.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_off0000c6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F6 5164 bytes
SHA-256: f3c6d68251e4f188719d3693c29e9f3567e6a250b62797d141d42ca471bbd811
font_01_sfnt_off0000d882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD882 10568 bytes
SHA-256: 841a0a06cbe81aa91a7ed1e315a6ece3a06264b8007ad197e6c90dfaf48b92fc

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