Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e59d5aa7f8da23c…

MALICIOUS

PDF

76.4 KB Created: 2021-03-22 21:51:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de15e3e3f610802206cf6bcf6fa925aa SHA-1: d4e713bb4b0a9653bb38154a4ba6ff3ef9400cb0 SHA-256: 6e59d5aa7f8da23c3fb3176142816cc93fd981d4f05f83598c530270a45e9702
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. It contains numerous embedded URLs, many pointing to disposable domains, which is characteristic of a link farm used to distribute malware or conduct phishing campaigns. The document body, though heavily obfuscated, suggests a lure related to 'keto australia'. No scripts were extracted, but the PDF structure and URL patterns strongly indicate a malicious intent to redirect users to harmful content.

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://resalured.ru/strik?utm_term=how+to+start+keto+australia
    • http://mini-camera-super.club/anestesia_regional_y_anticoagulacion6dz15.pdf
    • https://cdn.sqhk.co/kakapoxavu/X5uxYjg/nirerageziwegajamesosi.pdf
    • http://microbladingcertificationdfw.org/pokezuteneziweborupovedotsl58b.pdf
    • https://cdn-cms.f-static.net/uploads/4465397/normal_6010d2fce8c5d.pdf
    • http://wunutomerar.iblogger.org/63290117281.pdf
    • https://cdn.sqhk.co/jexozumumanu/jgkNiiR/4623309316.pdf
    • http://polfact.site/19778881560puhml.pdf
    • https://cdn-cms.f-static.net/uploads/4450355/normal_601746eccbb00.pdf
    • https://cdn.sqhk.co/gusorewiwal/RGgiJe6/idle_factory_tycoon_download_pc.pdf
    • http://ijmalan.xyz/how_to_charge_jbl_tune_205bt0yczp.pdf
    • http://vsspb.ru/el_arte_de_la_seduccion_robert_greene_audiolibro4ngcx.pdf
    • https://static.s123-cdn-static.com/uploads/4393641/normal_60045acf5f162.pdf
    • https://cdn.sqhk.co/wapadofiwe/gfK9ieM/77788616860.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nofefebevuxojaf.epizy.com/90391280677.pdf
    • http://fedixowodok.epizy.com/dorezeniwividirajamebux.pdf
    • http://pimimozoji.myartsonline.com/19300316689.pdf
    • https://b5f169ef-6bcf-4d19-a24b-32bdc9dd7a5f.filesusr.com/ugd/2e79a6_f2b92a84966c4581ab26a3100c897732.pdf?index=true
    • http://jajogagek.atwebpages.com/paradise_lost_book_9_themes.pdf
    • http://gavojomizam.epizy.com/my_aged_care_assessment_manual_march_2018.pdf
    • https://efed9c07-4553-4484-a419-1b844d271aeb.filesusr.com/ugd/6f475a_1be218210b304678842b34e2efe09182.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_off0000eac6.bin
7ea8c03737a2d75260b5fa0981c03c239361366435ebe9d7f8d8ef07972fbf27		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC6 4796 bytes
font_01_sfnt_off0000fb32.bin
623571bb148aa7b24d55a87796079d36e7e173ab6b8c0c1f903b4e96f3beb85e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB32 11512 bytes

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