Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d519198998069c4…

MALICIOUS

PDF

81.1 KB Created: 2021-04-04 06:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 410457c6c54d5654e51d6ec6e8b8905d SHA-1: dbdec86361b967b56fe52eb5d18129850a502179 SHA-256: 5d519198998069c4ec35cc5df4cda02da78d7a9c05aa1f7257bf353db256aeb5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many pointing to PDF files, suggesting a link farm designed to direct users to potentially malicious content. The ML classifier also returned a high confidence score for maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=uzi+airsoft+gun+co2
    • http://akmurzina.com/combat_tv_series_downloadaghfz.pdf
    • https://xegogebereduxu.weebly.com/uploads/1/3/1/1/131164392/6509269.pdf
    • http://lnstagramverifiedsbadgeform.com/1253855572hazi8.pdf
    • https://wujuxibivotalo.weebly.com/uploads/1/3/1/4/131453464/fetipumitu.pdf
    • https://static.s123-cdn-static.com/uploads/4495246/normal_5fcd2616666af.pdf
    • https://sujepofuk.weebly.com/uploads/1/3/0/7/130775011/5626415.pdf
    • https://faxomozux.weebly.com/uploads/1/3/0/7/130775398/jatef.pdf
    • https://ludolukek.weebly.com/uploads/1/3/4/6/134699908/2332148.pdf
    • https://jedurabononip.weebly.com/uploads/1/3/1/4/131453193/weganuzugisodu_janunita_soputoritu.pdf
    • http://obschee.xyz/40323582436gya39.pdf
    • https://cdn-cms.f-static.net/uploads/4407060/normal_5fd1fc5b2872e.pdf
    • https://lukuxafibufogi.weebly.com/uploads/1/3/5/4/135400428/sapipo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rugafejowa.rf.gd/subject_pronouns_worksheet_for_grade_3.pdf
    • https://a0d2adcf-75bd-42a9-a42a-c23e1c6e9e1a.filesusr.com/ugd/85c99c_4c775649b26142b9bd362198966a5f2a.pdf?index=true
    • http://xulivef.rf.gd/geraxadifemo.pdf
    • http://narezurirababod.rf.gd/balconista_de_farmacia_senac.pdf
    • https://4b98dde3-f65d-4e11-807b-d4501949e87b.filesusr.com/ugd/4a7ebd_f16ec25a12264a4f83ba9098834bfa5a.pdf?index=true
    • http://zapidomaxut.epizy.com/womemetowawogepuso.pdf
    • http://lebozid.epizy.com/rooftop_agility_guide_osrs.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eac1.bin
4c83dd205cbed5d67c8f58de74e04cf8ce513637b5e6bafbc760e5c98efc94a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC1 5192 bytes
font_01_sfnt_off0000fc8c.bin
086f4dd2046baad7d99647e9629c0499ea7610f5984045c238ff9ae8652e3e53		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC8C 11152 bytes
font_02_sfnt_off00012225.bin
c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12225 16204 bytes

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