Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaebb0ff3ab5170e…

MALICIOUS

PDF

77.7 KB Created: 2021-05-04 08:44:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9da050b40828005870d0cf0c9b79a695 SHA-1: 5fd13c9a884d96d93176a29e4383824ba3e050f1 SHA-256: aaebb0ff3ab5170e0729ffce9458962298d3e214f2f5530105d74e1edbfa3c61
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://baarspo.ru/strik?utm_term=what+is+rpa+process PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416495/normal_60039cad5383f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447460/normal_60210c91181f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452385/normal_601ad298b86a6.pdfIn PDF document text
    • http://bbflowers.net/ejercicios_suma_de_fracciones_con_didwbxp.pdfIn PDF document text
    • http://ryursew.space/aha_cpr_guidelines_2018x2uw0.pdfIn PDF document text
    • http://brightshopbg.xyz/bonadiroxiz6aud.pdfIn PDF document text
    • https://cdn.sqhk.co/nazamesuwute/hyiejeQ/86443715838.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470205/normal_60650185eb6e1.pdfIn PDF document text
    • https://cdn.sqhk.co/xubewarow/x2gjhiz/27560983285.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/bolovopizonuki/little_house_on_the_prairie_episode_6_season_1.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/concerning_the_spiritual_in_art_kandinsky.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/shark_euro_pro_x_sewing_machine_9110.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/lowes_kobalt_12_inch_miter_saw_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/23320956032.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/god_of_war_3_playstation_game.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/fifty_shades_darker_movie_download_moviescounter.pdfIn PDF document text
    • https://63dbeab4-18c6-4677-a808-17cd77aec119.filesusr.com/ugd/963d80_986e3ae6ba1243d5bb75f4a6b71dde57.pdf?index=trueIn PDF document text
    • https://47e4df30-8702-49a4-8bd5-327e1546ff06.filesusr.com/ugd/379272_874e0c907d50447aa2224c8e65f94ac6.pdf?index=trueIn PDF document text
    • https://235a1a37-2bc9-4d3b-8f1d-d3952ad9fba8.filesusr.com/ugd/3111f7_6d67e69817c345229abf9dc9fee46f3c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/abridged_annual_report_definition.pdfIn PDF document text
    • https://893c8be9-d140-4a04-8a3e-66bd54b472cd.filesusr.com/ugd/efd7ea_e71ad1f48dce446bbd4d3f9f3afba594.pdf?index=trueIn 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_off0000f4b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B2 5004 bytes
SHA-256: 92d227654f9de9cd68336ddebf0854ff2dfd64a918273a64540e793f73d062f0
font_01_sfnt_off000105bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BB 10652 bytes
SHA-256: 4b818eb691057b07da49e13b0486d3a2843a80d8c52913fa0f5c891133016e9b

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