Malicious PDF — malware analysis report

Static analysis result for SHA-256 b36641c551f87892…

MALICIOUS

PDF

75.7 KB Created: 2021-04-02 14:24:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a5d788fc6e02751749d535d0f1ce862 SHA-1: da00c9f89fa79063994459353b95514c4254c5be SHA-256: b36641c551f8789262bb29c54470f9ca47fa959c926e1c221123f045c6ee9bda
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of external links, many of which point to SEO-optimized PDF files, suggesting a link farm or phishing lure. The embedded URLs and the document's structure indicate it is designed to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/award?keyword=canon+in+d+piano+advanced+pdf
    • http://air-calm2.club/how_to_get_error_codes_on_kenmore_dishwasherirnly.pdf
    • http://zukoretevir.medianewsonline.com/jobodamewaterunebi.pdf
    • http://fumexijana.getenjoyment.net/cae_speaking_exam_practice.pdf
    • http://zutelotojenexop.getenjoyment.net/centrifugal_compressor_design_calculations.pdf
    • http://tumuduwaju.mypressonline.com/malokulekigumitirunina.pdf
    • http://zugasanuko.getenjoyment.net/inkscape_adjust_canvas_size.pdf
    • http://zutatowatipo.mywebcommunity.org/amiodarona_ampola_bula.pdf
    • http://dapujabowigu.sportsontheweb.net/caesar_cipher_worksheet.pdf
    • https://zapeledi.weebly.com/uploads/1/3/5/3/135314532/jupuvufuzomevekotog.pdf
    • https://tuxibefogeja.weebly.com/uploads/1/3/4/3/134359070/puvoneg.pdf
    • https://vekukedabil.weebly.com/uploads/1/3/4/7/134710008/turapulekodug.pdf
    • https://gikejujeg.weebly.com/uploads/1/3/5/9/135966421/dunag.pdf
    • http://gejulavofanutar.mygamesonline.org/92353645310.pdf
    • http://antonioita.fun/why_does_my_dishwasher_not_clean_properlyuxd06.pdf
    • https://zofifonanofanap.weebly.com/uploads/1/3/4/8/134876640/3a2ad3d9649.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5de9ed01-d610-4143-94db-6f998645a8ce.filesusr.com/ugd/1d8bf6_c20516996e934202a86906dd413ceb9c.pdf?index=true
    • http://duxegejuw.atwebpages.com/76085702879.pdf
    • https://387a498e-9551-4239-9507-3183ba214552.filesusr.com/ugd/cd403b_8175ff5d03964ebd80fe3a30158017d7.pdf?index=true
    • https://1ffb5d6c-d890-49e0-9b87-dc10fbfa49e2.filesusr.com/ugd/8bc2a6_9d07bd3960cf4724b911de45f2b86028.pdf?index=true
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_583474da8bf543ed9ef0b5bd2887e360.pdf?index=true
    • http://gupatevefojip.myartsonline.com/vekupi.pdf
    • https://4c982f7a-b72b-446d-8c7a-5e2d6818c0db.filesusr.com/ugd/519a61_b00532202cf14276a4387935b707a86e.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
    • 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_off0000d7a3.bin
1ad5fcb2d133ee2481a5d947a0412b71bcadbce6fe868329830fbd25ae704bfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A3 4808 bytes
font_01_sfnt_off0000e81f.bin
566b1fd10630bb020032b7613101a403ab0ea1a381bd4cdb6da177eb9f466d86		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE81F 10780 bytes
font_02_sfnt_off00010d7a.bin
b59afbb2f683942213df284fd86cd9422ada0c5f1ffac7698db8c94a40390bc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7A 16100 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.