Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a8f6323091e81e2…

MALICIOUS

PDF

81.1 KB Created: 2021-03-12 05:46:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 878fe29577a14b230468af1368d05a8a SHA-1: 92f8d3f8a135f22cb7edb234e58da1dd073749c0 SHA-256: 5a8f6323091e81e28d6e8f5a72bc24dfc5a0761e23d047c1547bdbfc5def3338
66 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or distribution point for malicious content. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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://gimoguvi.ru/wix?keyword=minecraft+shaders+1.5+2+download PDF link annotation
    • https://tazowodogakog.weebly.com/uploads/1/3/1/4/131437711/601037.pdfIn PDF document text
    • http://snatural.space/policies_of_human_resource_managementzrt98.pdfIn PDF document text
    • http://xobaxibudizoba.22web.org/gta_v_social_club_app.pdfIn PDF document text
    • http://kuzojud.66ghz.com/59857433316.pdfIn PDF document text
    • http://good-production16.site/fabby_camera_and_photo_editor_app0brlp.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/3erOo0U/14064773096.pdfIn PDF document text
    • http://onlyforyou.space/74762757343tl8a2.pdfIn PDF document text
    • http://vigastlens.xyz/the_adventures_of_tom_sawyer_by_mark_twain_book_review3jvmn.pdfIn PDF document text
    • http://aycotoro6.xyz/decrypt_md5_senha_em_mysqlwx9vp.pdfIn PDF document text
    • http://fastpysystem.online/topadoxowawuzagojef2vo4.pdfIn PDF document text
    • http://polfact.site/12868357086um6ll.pdfIn PDF document text
    • https://ledejikijosud.weebly.com/uploads/1/3/1/6/131607919/tuxuruzi-malijutiwulo-lovotifavilikal-jomepab.pdfIn PDF document text
    • https://cdn.sqhk.co/powurejur/giQiwgd/guia_de_excursiones_para_cruceros_por_libre.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/hxyFQuM/midupugowasusigafemudibe.pdfIn PDF document text
    • https://pefodiral.weebly.com/uploads/1/3/4/4/134476409/folojozojaropasegesa.pdfIn PDF document text
    • http://akvatehnika74.ru/zivojepojakem0ct.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/hhg25Ff/43200609744.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://toxiwudogosos.epizy.com/tefigoxopesagal.pdfIn PDF document text
    • http://xedupuxatox.rf.gd/p_o_britannia_deck_plan.pdfIn PDF document text
    • http://rixavadalut.rf.gd/reset_epson_l382_adjustment_program.pdfIn PDF document text
    • http://gukupexokopiwug.epizy.com/demuvedofinabomajakimad.pdfIn PDF document text
    • http://xujalupa.epizy.com/bodavusuvejaredafunasemim.pdfIn PDF document text
    • http://perinuve.epizy.com/viwoxetezabaremabagimiw.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E6 5544 bytes
SHA-256: d0b3d4fced0b0febf42bb9dfa48bb475cac0f805d7d0ce225d4e783b5bb39b62
font_01_sfnt_off0000fbed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBED 11672 bytes
SHA-256: cdfeda810377fa6c9566324f1caf2437b64f7f718be54a91ca567d3aea9f4aa5
font_02_sfnt_off0001219f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1219F 16064 bytes
SHA-256: 9b78b915eb75ef0aea6965a6113565ca1bcac7735c766488ce9f12ff332a71b4

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