Malicious PDF — malware analysis report

Static analysis result for SHA-256 eee1ffcf29ab5419…

MALICIOUS

PDF

97.2 KB Created: 2021-02-28 20:28:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f1eb17d9c173a3959801205afae6adb7 SHA-1: 79673b24e5cd0a345eb59bbeeb32b4d2b4a7cd36 SHA-256: eee1ffcf29ab541990f7b5986563457941cbf51f3f8951a1a0a7a0c4fd8defdc
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to potentially malicious domains, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. ClamAV also detected it as 'Pdf.Phishing.Trojan'. The document body is heavily obfuscated, but the presence of external URIs suggests an attempt to redirect the user to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/award?keyword=moog+sub+phatty+buy PDF link annotation
    • http://lnstagrambusiness.com/aruba_iap_103_configuration_guidelh538.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/xupoxotajinefejabobe0uabq.pdfIn PDF document text
    • https://cdn.sqhk.co/rejiwosujupa/NHigreL/carrom_rules_last_coin_and_queen.pdfIn PDF document text
    • http://digitalcalakk1.xyz/all_the_bright_places_film_reviewd46fa.pdfIn PDF document text
    • http://servicesforsupport.com/stock_trading_for_beginners_amazonjihif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402297/normal_602550167ce2d.pdfIn PDF document text
    • http://item-mask.top/cheap_thrills_sia_songsyyv0e.pdfIn PDF document text
    • http://taygerr.com/birthmarked_book6zqio.pdfIn PDF document text
    • http://kieverts.xyz/witakatajapotatghycd.pdfIn PDF document text
    • http://idealicaufficiale.website/medicine_names_and_uses_in_english3j4bi.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://weguxoxuwaxa.epizy.com/audio_de_la_biblia_reina_valera_1960descargar_gratis.pdfIn PDF document text
    • http://dezinovuxan.rf.gd/metal_gear_2_pc_fix.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/505824856.pdfIn PDF document text
    • http://vawutalakomu.epizy.com/56174747047.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/82853786854.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/gavimuveburifomiva.pdfIn PDF document text
    • http://wepilujal.rf.gd/furominit.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_off00013199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13199 4808 bytes
SHA-256: c4cd2f9a9898273b87119baf1d6c21a493fd5b92ab279fc8e7a07affa541233a
font_01_sfnt_off0001420d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1420D 11172 bytes
SHA-256: e2da1a947ca5039eacd76d3bc852839531b3304e8cfdc912545384d4719b527d
font_02_sfnt_off000167ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167EA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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