Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfade41aa9348b07…

MALICIOUS

PDF

81.9 KB Created: 2021-03-14 03:02:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d99bb9cce9520868641e130e33226a18 SHA-1: 977a509671fe5fe5c1d41125ec2abb4babfc1b61 SHA-256: dfade41aa9348b07b5d55ff2be70a3395159b7700863b615952ef47dcafccdd1
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The ML classifier and PDF heuristics strongly indicate malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' lure further supports a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://soxebez.ru/award?keyword=esl+complex+sentences+worksheet+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423750/normal_6017b629be84b.pdfIn PDF document text
    • http://raisinslabs.club/2008_dodge_grand_caravan_batterys9rrb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485015/normal_603ece3034712.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457849/normal_6031bdd16d033.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465270/normal_5fd13ce00f051.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454281/normal_600f1bbadb072.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421209/normal_60396b61d281e.pdfIn PDF document text
    • http://folivapizi.66ghz.com/mifepetovobogifage.pdfIn PDF document text
    • http://zijixiteluwek.scienceontheweb.net/21069639659.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417046/normal_5fe60c5bb0552.pdfIn PDF document text
    • http://sutiboju.sportsontheweb.net/movie_based_on_the_falling_man.pdfIn PDF document text
    • http://popularchoice.space/how_to_reset_ematic_converter_box5c8et.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454287/normal_5fe9dd0d64a11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460449/normal_5fcc7dbc7ab93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477164/normal_5ff60db17a8cc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lojabupabavize.onlinewebshop.net/taboxamumupitedebawita.pdfIn PDF document text
    • http://lugifer.onlinewebshop.net/malibu_lights_replacement_parts.pdfIn PDF document text
    • http://jufotafilowor.rf.gd/hp_envy_4500_driver_for_windows_7.pdfIn PDF document text
    • http://besenasoxa.epizy.com/badaxagizurud.pdfIn PDF document text
    • http://jafixomedimun.onlinewebshop.net/jesoriv.pdfIn PDF document text
    • http://nijarigu.onlinewebshop.net/zejafedun.pdfIn PDF document text
    • http://sivikonalijuto.myartsonline.com/3d_exporter_for_autodesk_inventor.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF409 5104 bytes
SHA-256: 2ac0addbe16b77a197b46c1975ef489917d759504a84c5aa9e0a8fe539195b3c
font_01_sfnt_off0001054b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054B 11336 bytes
SHA-256: 8b461b8644a5fb2ebe5308d847b20b0600a1ce1b97e1c5b8fe9d7cdecf946aba
font_02_sfnt_off00012bf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF2 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361