Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1deaef6cef72f90…

MALICIOUS

PDF

76.5 KB Created: 2021-04-01 17:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d86d5f8347aa2e532a8f9a5cbe98922f SHA-1: 6c92625a7fd0b61e0065eba56f9211ead7e6928e SHA-256: f1deaef6cef72f9036ec383ff8dea078abc97f95dc01d829ae807276859ebe75
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a phishing or content-farming attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=mhw+kulve+taroth+bow+guide
    • https://cdn.sqhk.co/padixemugex/gfgctij/best_free_file_manager_windows_10.pdf
    • https://cdn.sqhk.co/bepifopid/RE1ibMq/booking_revolution_wwe_2k17_mod_download.pdf
    • https://cdn.sqhk.co/deloreba/8hghjic/mawopopejapozusudokoga.pdf
    • https://mesajenijapab.weebly.com/uploads/1/3/0/9/130969967/7d842134efc2.pdf
    • https://jewadasin.weebly.com/uploads/1/3/4/6/134604584/sebodaziwozirofekad.pdf
    • https://cdn.sqhk.co/xotosobupis/B9Bfnha/xivapuzefemezabedefoxalok.pdf
    • http://winopajabareze.22web.org/30644721197.pdf
    • https://cdn.sqhk.co/wubunepan/hjh1ehe/top_10_best_camera_app_for_android_2020.pdf
    • https://gewuvakir.weebly.com/uploads/1/3/4/6/134660990/b31af5bb.pdf
    • https://xatikofaf.weebly.com/uploads/1/3/0/8/130814669/3695809.pdf
    • https://lijuvimu.weebly.com/uploads/1/3/0/7/130775306/4026167.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wiwafejopof.epizy.com/piwepufavo.pdf
    • http://magivaxinel.rf.gd/xazatafuwanurotofaz.pdf
    • https://a0f1d9c0-ea46-4e0e-9383-d87711d3127f.filesusr.com/ugd/1e3fb7_29078034822f47d69a19f6711d52e18c.pdf?index=true
    • https://9b08d158-0e0f-4203-9b31-e1272d977b1c.filesusr.com/ugd/086daf_337c678d4cf944f086ea7d44897c7ad7.pdf?index=true
    • https://s3.amazonaws.com/mibiwivanetuj/adeste_fideles_sheet_music_piano.pdf
    • https://s3.amazonaws.com/kovozenamofox/princess_bride_free_online.pdf
    • https://s3.amazonaws.com/jubiferekaka/31305661495.pdf
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_70ebc0fd1cf84db59c475fc81a7ff14a.pdf?index=true
    • https://4adff18d-dc39-4349-be2c-eeb12737f1cb.filesusr.com/ugd/9117e0_ff19c7c0fac74ba5addec12ba1d0deb6.pdf?index=true
    • https://s3.amazonaws.com/tugumeb/lajulaliwul.pdf
    • http://vopagaviximagu.rf.gd/how_to_sell_a_conservation_easement.pdf
    • https://s3.amazonaws.com/kudufigunabi/beats_solo_3_wireless_at_walmart.pdf
    • https://s3.amazonaws.com/wefadep/51123912870.pdf
    • https://s3.amazonaws.com/xuxifuzituwu/how_to_prepare_for_grammar_school_test.pdf
    • https://s3.amazonaws.com/dozore/46367633937.pdf
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_e51944ad67b046d0a52bb826590da75d.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee96.bin
411575d35de0d2fd11caf57baa66260d5a9349a42ad92b7eb179db4eac513b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE96 5272 bytes
font_01_sfnt_off0001009b.bin
60dc4383318263d394978b474654cfad99904a07a9212cb59551b8d674482b0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1009B 10460 bytes

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