Malicious PDF — malware analysis report

Static analysis result for SHA-256 89627c26cd3fa849…

MALICIOUS

PDF

76.8 KB Created: 2021-03-13 23:12:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 00a43aafed95f256e70e8227a75d51f4 SHA-1: c67cce84dcaafbc706bbf6133e55f935218d1211 SHA-256: 89627c26cd3fa84969addc4142a2c308ceec14984a0acc3cd480ade63ec05594
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

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
  • 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://mezovuduw.ru/wix?keyword=john+brown+harpers+ferry+worksheet PDF link annotation
    • http://pumesuj.iblogger.org/lezezaripebar.pdfIn PDF document text
    • http://lojupubevodi.22web.org/12813248600.pdfIn PDF document text
    • http://mujudesuxiropa.sportsontheweb.net/92777494067.pdfIn PDF document text
    • http://wavakidagipav.iblogger.org/autotransformer_motor_starter_operation.pdfIn PDF document text
    • http://sagunutu.medianewsonline.com/reading_level_to_lexile_level_conversion_chart.pdfIn PDF document text
    • http://deliwubavamir.mypressonline.com/adobe_reader_8_free_download_for_windows_xp.pdfIn PDF document text
    • http://pegejoruvufiron.sportsontheweb.net/vanawotufizu.pdfIn PDF document text
    • http://xenotobewaf.22web.org/husqvarna_460_rancher_parts.pdfIn PDF document text
    • http://kejumazinanu.mywebcommunity.org/contoh_leaflet_bahaya_merokok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://genenapukiral.epizy.com/zubawixozivanojipu.pdfIn PDF document text
    • http://genojamezuti.rf.gd/how_to_reset_pioneer_mixtrax_avh-4200nex.pdfIn PDF document text
    • http://tuxabatadifu.onlinewebshop.net/17997545005.pdfIn PDF document text
    • http://dizibabazuvuxu.rf.gd/the_jack_tales.pdfIn PDF document text
    • http://ribaxexumipo.rf.gd/cerebellum_histology_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/kojotefafitozafid.pdfIn PDF document text
    • http://xisomifufob.epizy.com/jatog.pdfIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_27dc9406ae98427db0fcebbb60c4befd.pdf?index=trueIn PDF document text
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_11f4089c8cdd477aac4c3da008a09741.pdf?index=trueIn PDF document text
    • http://jovawat.epizy.com/94037559445.pdfIn PDF document text
    • http://feferabi.atwebpages.com/fujemofoz.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/basic_electronics_books_free.pdfIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_9b2a8a7d9979480b853b344b8f3da79f.pdf?index=trueIn 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_off0000f00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00C 5344 bytes
SHA-256: 45f846a89c95994c4d60ae586234e917f3e1e4145a8b73dbd9897e2ab062de8e
font_01_sfnt_off0001024d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024D 10280 bytes
SHA-256: 7a84f746d098879b12e931fa783e0676051575d442efb2de105781d830bcc9cb

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