Malicious PDF — malware analysis report

Static analysis result for SHA-256 03bae990af2da18b…

MALICIOUS

PDF

83.0 KB Created: 2021-04-08 05:09:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7e666688cdc0c0101e989b08d9db2cd SHA-1: 775fa118f2137f3fa076cbb8769c046f5377fc61 SHA-256: 03bae990af2da18b3d45325c69d53f14736eddd2fb3e2f513211f02c8e354783
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are SEO-optimized and point to potentially malicious domains. The document body, though heavily obfuscated, appears to be a lure related to a book title, suggesting a phishing or scam attempt. The presence of numerous external links and the ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware-hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=resumen+de+el+coronel+no+tiene+quien+le+escriba+pdf
    • http://socialwave.me/90297962534a44yi.pdf
    • https://bilojajix.weebly.com/uploads/1/3/4/6/134626800/tuxiwazitu_javexoxi_wefev_mesaki.pdf
    • https://warazafipa.weebly.com/uploads/1/3/1/3/131381481/subuzosulel-wivakagejixef-vanifefovi.pdf
    • http://tryporte.xyz/nezazowosasejariperi68lqr.pdf
    • http://afracheat6.xyz/do_all_adverbs_end_in_ly5j1tq.pdf
    • https://piwevowukitibe.weebly.com/uploads/1/3/1/4/131454699/welovinip.pdf
    • https://livubefelamujir.weebly.com/uploads/1/3/4/8/134899239/xisivimafun_vuvowag_zokenuzu_ridevu.pdf
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/4227329.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/potamotaz/mandated_reporter_california_number.pdf
    • https://s3.amazonaws.com/papuja/sujupokulakiselaz.pdf
    • https://uploads.strikinglycdn.com/files/4ade0b41-79f0-4d6e-819e-25455fec2b10/tajod.pdf
    • https://cf268418-7549-4780-9cff-e39e61b5276c.filesusr.com/ugd/0b1cf2_f87416075d2f48edba6ad95d33a190e7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/62c72ab3-04c5-41d4-a528-3e5493d664cc/feminist_literary_criticism_definition.pdf
    • https://uploads.strikinglycdn.com/files/c077383e-c34d-4e88-af9d-964682c762f2/what_is_the_functional_analysis_approach.pdf
    • https://s3.amazonaws.com/xokebore/dish_network_cheapest_package_2019.pdf
    • https://uploads.strikinglycdn.com/files/3c7df497-5687-4713-af48-b118c4a4cb91/descripcion_de_personajes_la_ciudad_de_las_bestias.pdf
    • https://720c7b34-a033-4bf0-83ea-6be17de98aa2.filesusr.com/ugd/03ef8e_4c864f4d14d1457bbed74a548292bc13.pdf?index=true
    • https://uploads.strikinglycdn.com/files/662dd465-60f8-4142-95ad-01eb8a89599e/20617491943.pdf
    • https://29c5b005-6627-40e3-9da1-9f9d3dbc34dc.filesusr.com/ugd/7ad284_ea3f2275e8b4426782a6ebcb7ff95ee7.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101d9.bin
efa4ba71bff91bd514f677225ebe233e28309123ba84fbffc23e2afadb58bddd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101D9 5572 bytes
font_01_sfnt_off000114b0.bin
f362b11c01ec9800f73b9aec075ab4545fd3991517ca0c2a5bf7425b9a925faf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114B0 12264 bytes

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