Malicious PDF — malware analysis report

Static analysis result for SHA-256 259f0eacbd5e9c05…

MALICIOUS

PDF

76.4 KB Created: 2021-02-14 11:54:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8d6cad452170907b85b3aaec4db59507 SHA-1: e900fcdc3412a94551ed30460ed5ad6b32202356 SHA-256: 259f0eacbd5e9c058c00af23194e17529132aec0c131218bde93cde47d54c28d
136 Risk Score

Malware Insights

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

The PDF contains suspicious links, with one explicitly noted as an 'invisible link to suspicious domain'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The presence of embedded URLs and the nature of the heuristics suggest the document is designed to trick users into navigating to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://jacksth.ru/123?utm_term=definitive+technology+prosub+1000+repair PDF link annotation
    • http://ig-socialmedia.xyz/guwiwelavofoxesimapuxiuwual.pdfIn PDF document text
    • http://porn77.design/78417532362pqqdp.pdfIn PDF document text
    • http://jorolog.22web.org/weather_report_of_bharthana_etawah.pdfIn PDF document text
    • http://policyhelpcenter.com/67335906078sezzg.pdfIn PDF document text
    • http://educationonline.website/countess_map_darkest_dungeonztoly.pdfIn PDF document text
    • http://loginwithfb.site/paper_origami_frog_that_jumpst4p2i.pdfIn PDF document text
    • http://geniusenglish.space/niv_audio_bible_apk_freesy7co.pdfIn PDF document text
    • http://getsalle.xyz/mofomexijti7lm.pdfIn PDF document text
    • https://cdn.sqhk.co/gagowuname/ghCj19k/metro_express_lane_ticket.pdfIn PDF document text
    • https://cdn.sqhk.co/tefozakozup/ajbgdid/toca_nature_mod_apk.pdfIn PDF document text
    • http://reduslim-shop.site/ahi_ente_hurrun_mp3_indirdgq3v.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/gftoEjj/252971875.pdfIn PDF document text
    • http://testersairf.xyz/imdb_vikings_season_5_episode_10cqajq.pdfIn PDF document text
    • http://mysteps.online/48040863647buwvd.pdfIn PDF document text
    • http://vizit.store/zitojavosipewabunikabqf19e.pdfIn PDF document text
    • http://legendnat.space/759506865423s1a2.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/forupokisip/array_in_rpgle_free_format.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/alaska_map_template.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/best_strategy_games_for_android_mobile.pdfIn PDF document text
    • http://tutunod.epizy.com/15932792783.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/atheros_ar5b125_driver_windows_7.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_off0000e806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE806 5772 bytes
SHA-256: 3596e8df7ca5467b27f9873707e41952f24dc8470413cecf5c3758ef17a0039f
font_01_sfnt_off0000fbc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC6 11776 bytes
SHA-256: 8ac92bf985fe5c45b9beb6df8196ee65a4e162fe2be7ce599b705353b6b096fa

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