Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c24f35472a191bf…

MALICIOUS

PDF

73.6 KB Created: 2021-09-18 15:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9b4d2ace4cf7a956ef77879e04b0ef34 SHA-1: a3d7e716c88125181d5b58bbb2e86d008cd56092 SHA-256: 6c24f35472a191bfc28803bef112291d3b320fe42c75a13de9ad5498f5f0ef5a
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://synerhu.ru/uplcv?utm_term=libro+de+swokowski+pdf PDF link annotation
    • http://ilovestory.com/upload/file/lelokigejez.pdfIn PDF document text
    • https://triosms.com/userfiles/file/pefedumapusibotilozup.pdfIn PDF document text
    • http://castel.lu/userfiles/files/xenakanuketepetepu.pdfIn PDF document text
    • http://apartamentykunickiego.pl/architekci/public/upload/ckfinder/userfiles/files/89285992421.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612f38e580250---purekejov.pdfIn PDF document text
    • http://ihdbd.org/upload/files/bekipofa.pdfIn PDF document text
    • http://macierz-grodziec.org/files/file/kaviwamowefularinitupos.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/wemerozewevoxej.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210910_183538.pdfIn PDF document text
    • https://candica.pl/ckfinder/userfiles/files/wikobumexapabiz.pdfIn PDF document text
    • http://adgroup.co/userfiles/file/14748262822.pdfIn PDF document text
    • http://munnarteabungalows.com/userfiles/file/87898483706.pdfIn PDF document text
    • https://snoman.mb.ca/ckfinder/userfiles/files/jujudunegafuzexamefowo.pdfIn PDF document text
    • https://cfi-registration.org/buzzboxgift/img/userfiles/files/relopijodifesukar.pdfIn PDF document text
    • http://iiiemjobs.com/FCK_Editor_Images/files/sijalugemezorisudamev.pdfIn PDF document text
    • https://yellowmangocafe.com/userfiles/file/25411123946.pdfIn PDF document text
    • https://snowcat.pl/admin/ckfinder/userfiles/files/zumuruzezabalo.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/14767329639.pdfIn PDF document text
    • http://gwardiajuvenia.pl/zdjecia/fck/file/wevaxopijimama.pdfIn PDF document text
    • http://btfa.tw/upload/files/tuxewopuvesij.pdfIn PDF document text
    • https://www.newhorizonscrisiscenter.org/ckfinder/userfiles/files/78882822113.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bcd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E8 17168 bytes
SHA-256: 3906036ec0714ed28e4a7da2dda90dffeb572195a1c4e0425455f817a7785990
font_02_sfnt_off000101ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AB 10356 bytes
SHA-256: a9672ada65cda63ae18e2ef424cd7c96c1484c08ecc53c131b54e835aa84a83f

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