Malicious PDF — malware analysis report

Static analysis result for SHA-256 b64e8650b11c7b32…

MALICIOUS

PDF

81.1 KB Created: 2021-03-30 16:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 723a989ea514b8506940b7498d4dbbdc SHA-1: b1abe3cd4d761e882d8b9df61f2414e92cf1dfb6 SHA-256: b64e8650b11c7b32dc6ae6cf5719a5758d1b5c93c62ff7525ff38582e8ee930e
126 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, indicating a link farm or phishing lure. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly suggest malicious intent. ClamAV also detected it as 'Pdf.Phishing.Trojan'. The embedded URLs are the primary indicators of compromise, likely leading to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pelibifir.ru/wix?keyword=hurricane+felix+cuba PDF link annotation
    • http://reduslim-ordina.site/what_does_the_andrew_jackson_political_cartoon_meanzs92s.pdfIn PDF document text
    • http://siradiru.22web.org/orchestration_book_free.pdfIn PDF document text
    • http://opendouche.xyz/reading_comprehension_books_freez0g9h.pdfIn PDF document text
    • http://study-english-05.site/vikemibeniwamoecmti.pdfIn PDF document text
    • http://mexicotop.xyz/gegumbq0za.pdfIn PDF document text
    • http://raftgjgr.space/10541535240rxzo4.pdfIn PDF document text
    • http://nonretloli.site/89894153870ekjxi.pdfIn PDF document text
    • http://arendagg.xyz/database_management_system_mcq_questions_with_answerspm8qj.pdfIn PDF document text
    • http://f13x.xyz/char_broil_electric_bbq_redhsssb.pdfIn PDF document text
    • http://klokisik.space/nizunisofapevabupelozulrbwc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c546c886-5aa5-41cc-813f-4ed3e146772c.filesusr.com/ugd/b3e52d_52228b6228fd41f08790c626892dba92.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/watajive/ascvd_score_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/xudef.pdfIn PDF document text
    • https://6bc553e5-d0de-4278-827a-c77c8eb32fbd.filesusr.com/ugd/4a6c57_089cc3d295684b5ba2c01d5cda69b6dc.pdf?index=trueIn PDF document text
    • https://1e438cd7-6f3b-42ac-a97b-d13a75fa135b.filesusr.com/ugd/0c268c_e33ec49c1c2a43b5896f14c1896f6912.pdf?index=trueIn PDF document text
    • https://5c09c65f-4728-49e3-9562-8692e696fc4f.filesusr.com/ugd/32acb1_191b89fbbab54c13b6e778569ae1048a.pdf?index=trueIn PDF document text
    • https://d33b8dfc-9792-4d26-9d81-613d0bd32a71.filesusr.com/ugd/d34367_68e3183c130b4b3a8dc6bf4ef32bf630.pdf?index=trueIn PDF document text
    • http://meganajaxovitag.rf.gd/anand_telugu_full_movie_mp4_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/calculating_percent_off_worksheets.pdfIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_cb36ebd1fdf443a3a63edb4e72d34176.pdf?index=trueIn PDF document text
    • http://pegafiloxor.epizy.com/what_is_progressivism_theory.pdfIn PDF document text
    • http://pizoxuwa.epizy.com/codrops_responsive_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/dell_precision_t1700_workstation.pdfIn PDF document text
    • https://80c8fd16-4cf8-4f9f-b52b-d6c956df8f3b.filesusr.com/ugd/1a94e8_8873271cf37c4c478b1d6e8ac184ec3d.pdf?index=trueIn PDF document text
    • https://4b5f4e46-8b81-4257-bf39-61fc08ba57b0.filesusr.com/ugd/7ea8bb_2d0913a07bb14bacb02e9575bffa81a3.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_off0000fe8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8E 4864 bytes
SHA-256: d1b51e9133d3b7e90cff3a955667ca0142aa6b9f7ea6ca4864103626ec0907d1
font_01_sfnt_off00010f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2E 11836 bytes
SHA-256: 5c8fcd33730b40d5ad7208a509ac498ee1335e5c0daab4e4c08b702dcf40b81d

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