Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae6353bbdf833ea6…

MALICIOUS

PDF

68.4 KB Created: 2021-03-29 05:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5eda86603960022be865a596094268c5 SHA-1: 381745bd381575405e3c6d4f12d2697163f44678 SHA-256: ae6353bbdf833ea6cdf801e760508db19a18c13a47176a07e6a6316ed3ec4a3c
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains embedded URLs that lead to suspicious domains, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to 'Autocad sencico pdf', likely intended to trick users into visiting the linked sites.

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://kuzutuzo.ru/award?keyword=autocad+sencico+pdf PDF link annotation
    • http://lorewipa.scienceontheweb.net/les_animaux_en_franais_et_en_arabe.pdfIn PDF document text
    • http://baramijotafexo.mypressonline.com/risamarosufiwup.pdfIn PDF document text
    • http://pogaxaseninowa.iblogger.org/libro_apologetica_catolica.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/gejumulowag.pdfIn PDF document text
    • http://trysalon.xyz/physics_vectors_problems_and_solutionsxv7tl.pdfIn PDF document text
    • http://hydrofthol.space/how_do_i_program_my_philips_remote_to_my_tvrdgcc.pdfIn PDF document text
    • http://tonevagewalilu.medianewsonline.com/wuditogulexisugisiralodo.pdfIn PDF document text
    • http://riniwodifole.medianewsonline.com/bobaxularifadukagarodi.pdfIn PDF document text
    • http://ladebizelase.scienceontheweb.net/zuzexijavaxudigodejokida.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://15e12281-0fef-4bb1-b284-2b61ddec1698.filesusr.com/ugd/6c5390_5394df9165c14431bdb90dce007409bc.pdf?index=trueIn PDF document text
    • http://gifidabula.atwebpages.com/bemavo.pdfIn PDF document text
    • http://vuzelupuz.rf.gd/watitawejuliletejirip.pdfIn PDF document text
    • https://e9593579-f51f-4dc6-af55-2543ab512b45.filesusr.com/ugd/37952c_642808d4b8f44ba1b1219abebe63a0f4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/autoit_script_recorder.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/44556818827.pdfIn PDF document text
    • http://libejejizu.epizy.com/vermintide_2_kerillian_guide_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/nattamai_movie_teacher_bgm.pdfIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_296c6588e02344309f698cbab938afdb.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_off0000d052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD052 5012 bytes
SHA-256: f1da925d3f1c8a8257c2010a8ec5489ebfa68b78f3af8716aeb9fad9627b2f9c
font_01_sfnt_off0000e17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17A 10908 bytes
SHA-256: 9110a250e5b0c30600016b02c4211e9398bd764cb458dd296b167f50fee45a69

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