Malicious PDF — malware analysis report

Static analysis result for SHA-256 b18db52bb02f3091…

MALICIOUS

PDF

84.7 KB Created: 2021-10-11 08:14:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 75addbbf66b17721f914a75d32cb4dbf SHA-1: 63f3308b4c0179d706b6e7160786637c2e6e1119 SHA-256: b18db52bb02f30917fa8b424e5cbafc7d07218e29933b17b63174e9e81ae9760
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs pointing to disposable domains, indicative of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious sites, which are presented as a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pixomot.ru/uplcv?utm_term=roseola+in+infants+treatment PDF link annotation
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/popalizonofubukuvamubem.pdfIn PDF document text
    • https://yellowstonewildlife.com/93403115702.pdfIn PDF document text
    • http://musclecar-taps.com/js/upload/files/36659054746.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613396ce9c88b---23417948038.pdfIn PDF document text
    • http://filippodelvita.com/demo/userfiles/file/gafavuduvokelepiwikosaze.pdfIn PDF document text
    • http://teleinwestor.com/userfiles/file/gokinajun.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/202198211958511.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/jufozatokosuzatinirus.pdfIn PDF document text
    • https://em.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/petatevixil.pdfIn PDF document text
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/14245309223.pdfIn PDF document text
    • http://yachtandgulet.com/userfiles/file/69466915686.pdfIn PDF document text
    • https://biographiewerkstatt-singer.de/userfiles/file/miluk.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/14024778730.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/narowedevobekomu.pdfIn PDF document text
    • https://magnanerie-cazilhac.com/userfiles/file/fawugekegujawobururoba.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/62184391324.pdfIn PDF document text
    • http://squarcialupirelaxinchianti.com/writable/public/userfiles/file/fukika.pdfIn PDF document text
    • http://ecole.ru/text/images/file/55210588486.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/61732355445.pdfIn PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210916131720.pdfIn PDF document text
    • http://uktohabbarijamalta.com/files/file/vogutugomowiz.pdfIn PDF document text
    • https://hssanesteban.cl/files/riwanomaxe.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_off0000e423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE423 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC35 19124 bytes
SHA-256: 0b35abc2cae363b99dffa87792c04ec11c96ff4e82f3f2479542f451356f8014
font_02_sfnt_off00012dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DCE 10420 bytes
SHA-256: 67d5ac9fe8692c5e95a0ffd4d33a8bdad07501c7fe50b3352478ac8ef3351904

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