Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e364c1b5aaa2e41…

MALICIOUS

PDF

77.2 KB Created: 2021-03-06 00:34:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 7e997d726d486dcd2974579625065294 SHA-1: 9f7fe30cf9085bfcf8cd2646fdb13913bd18560f SHA-256: 0e364c1b5aaa2e41f7163ba2c5d220e0afcfb9429458486572ba06b9e4faeb14
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily corrupted, contains fragments related to a pool filter, likely a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://baarspo.ru/strik?utm_term=summer+waves+pool+filter+type+b PDF link annotation
    • https://cdn.sqhk.co/gonolesuzam/AgdjbpA/16532419590.pdfIn PDF document text
    • http://tixaman.scienceontheweb.net/talorovudovisewogunupo.pdfIn PDF document text
    • http://beach-fruit.fun/best_android_radio_app_ukc2u8o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_603d5fdac35ac.pdfIn PDF document text
    • https://cdn.sqhk.co/seseniluvus/cuhgGpQ/23298791418.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466161/normal_6002dd342691f.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/higOFgd/squad_conflicts_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zatugudaxaji/zdm4hgw/commuter_cars_tango_t600.pdfIn PDF document text
    • https://cdn.sqhk.co/tamejenonisi/QJjd3hb/naginojiga.pdfIn PDF document text
    • http://crawlmqyu.space/rurunozedutonuluxoboc7sf5.pdfIn PDF document text
    • http://fonujameritules.getenjoyment.net/39662605448.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375075/normal_5ffeb246e6e51.pdfIn PDF document text
    • http://vudifabofugejij.medianewsonline.com/vofegodusonuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tikomiwewo.atwebpages.com/how_to_use_excalibur_remote_starter.pdfIn PDF document text
    • http://kuwitabetegipo.myartsonline.com/how_to_get_a_duplicate_identification_card.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/resumen_del_libro_tus_zonas_erroneas_capitulo_2.pdfIn PDF document text
    • http://kisalonokexiwi.atwebpages.com/how_to_stop_vizio_sound_bar_from_turning_off.pdfIn PDF document text
    • http://fataragoreb.myartsonline.com/can_you_upgrade_from_i_pilot_to_i_pilot_link.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/58974197622.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/sovemitekidusi.pdfIn PDF document text
    • http://wumafopid.onlinewebshop.net/53395320942.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/81981147153.pdfIn PDF document text
    • http://faleferesevo.onlinewebshop.net/48170596693.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/catia_v5.pdfIn 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_off0000f136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF136 5544 bytes
SHA-256: 39309aaf94e0284ea4a7987bafcf3920d30ee1550118e716c77ea9bf39353826
font_01_sfnt_off00010410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10410 10392 bytes
SHA-256: f9c4613e30bc3048f39e2290308e90d062ec4e7c772f12f0d36d789e3999951f

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