Malicious PDF — malware analysis report

Static analysis result for SHA-256 f262058fcaee3f44…

MALICIOUS

PDF

76.5 KB Created: 2021-03-24 23:26:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e833271cc5c117e25c45b86abb600add SHA-1: 2fe6bd61c03b4ca00ddaa55bc6a660871733ab34 SHA-256: f262058fcaee3f4406eb8aa31976c6e6b211da6ea11b530f0cf4114946267e78
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious phishing content. It contains a large number of external links, suggesting a link farm designed to distribute malicious content or redirect users to phishing sites. The primary malicious URL identified is https://seumenha.ru/wix?keyword=bibliografia+apa+libro+online.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/wix?keyword=bibliografia+apa+libro+online
    • https://cdn.sqhk.co/fetumamuv/hehgijE/oneguard_panic_button_crossword.pdf
    • http://datujizid.iblogger.org/benjamin_graham_the_intelligent_investor_indonesia.pdf
    • http://vobefoli.iblogger.org/answerable_meaning_synonym.pdf
    • https://cdn.sqhk.co/xewumoxu/0nUsPQL/minecraft_bee_template_tutorial.pdf
    • http://wukebejajixajen.iblogger.org/59780935384.pdf
    • https://cdn.sqhk.co/bexefoboxevi/cgfz6hj/hd_voice_recorder_pro_apk_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fafovinipola.epizy.com/tekosa.pdf
    • https://f3dbd103-cf2f-44fc-b0ad-c9004dc38af2.filesusr.com/ugd/1f2646_2955616b372f478dafbfcc156e3b0363.pdf?index=true
    • https://eb9d0a7c-f241-4274-9260-18def620c3fd.filesusr.com/ugd/796b85_4eb9c1eb604244df97973e8d2d43ab12.pdf?index=true
    • https://0b21792c-a699-4cf4-8833-5910c6ad58af.filesusr.com/ugd/b0b521_f3954b08bc4f45ff9ef756c8dfd68583.pdf?index=true
    • https://d0275d90-c5b4-4c72-b581-d0e2b62fc6dd.filesusr.com/ugd/ee54da_cc87a7e66b3e4b1688090ffaaeee9435.pdf?index=true
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_067a4937cc7449328ded6c8d18611449.pdf?index=true
    • https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_1f36ac7f599b4b2aa3754227a1c7f856.pdf?index=true
    • https://6200e599-3f2f-4e3e-ab45-e6977ed7e777.filesusr.com/ugd/f8de3e_1f7f84ae0cfc49b48dd8a33236029d8c.pdf?index=true
    • https://2ae8fa2d-8b21-4cd7-bd94-b44763fb9b4d.filesusr.com/ugd/8e1ec7_534cc3c993d34666ba7746bf1d28f087.pdf?index=true
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_a7bb0efcb9e04ef3835f78d78e95da38.pdf?index=true
    • https://d6921c5e-ad40-47a8-8d28-605c6bd4eeef.filesusr.com/ugd/3306a4_5aeb6a59444f4346952ee98d33612bc7.pdf?index=true
    • https://945c5b1a-9feb-4a08-b72d-c905ca1b1520.filesusr.com/ugd/27135d_e30369575f6e42039c013a71de1ef1ea.pdf?index=true
    • http://lamafuravufezin.epizy.com/nutrition_care_process_and_model_part_i_the_2008_update.pdf
    • https://e905a76e-7bc1-418c-be29-e8eda1603e86.filesusr.com/ugd/3fb32a_bfd9b42cb21640ada17abb69fc9431f6.pdf?index=true
    • http://genupoxozasi.epizy.com/26370329622.pdf
    • http://burelagufepe.epizy.com/microcrystalline_cellulose_properties.pdf
    • 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_off0000eb27.bin
73f4a03a45df0d96091d6f13feeb48cf5a5208432d6c08d4dc2943c9939c454a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB27 5080 bytes
font_01_sfnt_off0000fc87.bin
0f3d819b886101570ec28f38fd6386d5f15cd06660e2d5a929f693e570b0f950		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC87 11804 bytes

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