Malicious PDF — malware analysis report

Static analysis result for SHA-256 c278fe4e4f04c51d…

MALICIOUS

PDF

89.4 KB Created: 2021-04-06 19:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6c556a404b05eb192947719491e349f SHA-1: b5d09a87c61ce0179eff9070409d5d4e9e1c8b16 SHA-256: c278fe4e4f04c51d83f722d1f57d8cad8b261c139f17763dfb372f4bed52efca
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with a primary lure pointing to 'xezojetit.ru' disguised as a Cisco Meraki splash page template. The presence of external URIs and link farm heuristics suggests an attempt to redirect users to malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://xezojetit.ru/123?utm_term=cisco+meraki+splash+page+template
    • https://fewegako.weebly.com/uploads/1/3/1/4/131453302/1998725.pdf
    • http://fuwiduwoxobol.mygamesonline.org/dofanawufibu.pdf
    • https://fekizozawar.weebly.com/uploads/1/3/4/3/134338272/ritobaxati.pdf
    • https://zamosokajuzosa.weebly.com/uploads/1/3/4/6/134651904/5611863.pdf
    • http://sirunome.mypressonline.com/sony_bravia_led_tv_manual.pdf
    • https://cdn-cms.f-static.net/uploads/4404292/normal_600da376a4595.pdf
    • https://static.s123-cdn-static.com/uploads/4409420/normal_5ff63392d89da.pdf
    • https://pakipuxis.weebly.com/uploads/1/3/5/3/135347710/xuvabuk_jilis_zagapikofu_mojozipivikedo.pdf
    • https://pewituzusab.weebly.com/uploads/1/3/0/8/130874049/zuterejibuko-wewoviweli-sotetubimemiso.pdf
    • https://static.s123-cdn-static.com/uploads/4417046/normal_5ff7c7138e918.pdf
    • https://cdn-cms.f-static.net/uploads/4403948/normal_601aefd3d3311.pdf
    • http://zerudomafiko.iblogger.org/jafovubalusu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rizivubonulej.atwebpages.com/graphic_designer_portfolio_examples.pdf
    • http://mimojududike.epizy.com/20371934861.pdf
    • http://kokitivem.rf.gd/briggs_and_stratton_450e_series_spark_plug.pdf
    • http://womuxiz.epizy.com/bodyweight_training_program_for_skinny_fat_guys.pdf
    • http://jenuvuzawo.epizy.com/halloween_history_esl_worksheet.pdf
    • https://s3.amazonaws.com/palevijuj/school_administrative_assistant_duties_and_responsibilities.pdf
    • https://s3.amazonaws.com/wuvepilamamuse/kukibanigi.pdf
    • https://s3.amazonaws.com/vatosolikijike/bruit_du_coeur_foetal.pdf
    • https://s3.amazonaws.com/xisefowu/informal_grievance_meeting_template.pdf
    • http://dijimati.rf.gd/diagnostico_empresarial_ejemplo.pdf
    • https://s3.amazonaws.com/vikukinumet/blizzard_entertainment_overwatch.pdf
    • http://xadezifu.rf.gd/48110910971.pdf
    • http://jisijuvod.myartsonline.com/69034440112.pdf
    • http://mekepij.rf.gd/asientos_de_ajuste_y_cierre.pdf
    • http://kojexeruxub.epizy.com/xexupapelipuvivute.pdf
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010428.bin
1e78b7c94a2f20fe08b63b36d13433eb96d245926488b97e68b0f17f52af1d5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10428 5316 bytes
font_01_sfnt_off00011612.bin
8feb9d62cb8d3eb61512e51b781cfadbe374ea7d2a832656cd4bbd30c2798c1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11612 12264 bytes
font_02_sfnt_off00014022.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14022 16204 bytes

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