Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d56b5ab063a0d1…

MALICIOUS

PDF

82.8 KB Created: 2021-09-19 08:36:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: bdf679fcd2b58f7083863b4072277936 SHA-1: 4cb3139c4562621d69082f7dd18dd33fc110b738 SHA-256: e2d56b5ab063a0d150b6652e282da67bad9568cf63f130a6b3637cfae4e5a24d
154 Risk Score

Malware Insights

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

The sample is a PDF containing embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The PDF also contains a clickable URI pointing to a raw IP address, indicating an attempt to host a secondary payload. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://cargoservice.pl/cargoservice/userfiles/file/78504354516.pdf In PDF document text
    • http://25630638.kad.tw/kads/ckfinder/userfiles/files/gegiluvowitomukugalo.pdfIn PDF document text
    • http://zamdq.com/filespath/files/20210912181307.pdfIn PDF document text
    • https://elmawadah.com/userfiles/file/takodufonozomumiroko.pdfIn PDF document text
    • http://synhbio.com/upload/files/79713479978.pdfIn PDF document text
    • http://mgbig.com/upload_fck/file/2021-9-15/20210915161027653353.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/xuvidikutu.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144c8d5a77f0---datababikazanagifafa.pdfIn PDF document text
    • http://pop-around.com/file_media/file_image/file/90361695573.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/mitigakowupodebuzu.pdfIn PDF document text
    • http://plovdivweek.com/app/templates/js/ckfinder/userfiles/files/26301661574.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/43626667981.pdfIn PDF document text
    • http://ping-property.com/user_img/files/71633010834.pdfIn PDF document text
    • https://jv-cms.crazy-jessie.nl/uploads/files/mimubiwidofu.pdfIn PDF document text
    • http://prosquash.by/data/bapibifetufirowo.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/d3e6640355653d300af8e8f08031b233/26488156584.pdfIn PDF document text
    • http://elverum-revmatiker.no/images/file/21567138489.pdfIn PDF document text
    • http://bebaldebaran.eu/userfiles/files/sagububemomadatal.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/sovamobupudigaso.pdfIn PDF document text
    • http://optimumnieruchomosci.pl/uploads/userfiles/files/55321955527.pdfIn PDF document text
    • http://novo-foto.ru/ckfinder/userfiles/files/80531307147.pdfIn PDF document text
    • https://www.aicsmindia.org/ckfinder/userfiles/files/45766173861.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/defopebokibavinarupaxej.pdfPDF link annotation
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jovewavikipitoxexolitunu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=ekg+plain+and+simple+4th+edition+pdf+downloadPDF link annotation
    • 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_off0000de2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2C 17644 bytes
SHA-256: 2e877523fbd66985482ed65973a5435fdb521807434405b64bb949a620e2a4c3
font_01_sfnt_off00010bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D3 11084 bytes
SHA-256: f1d8d6e59804a79a48990d49a2f7c5d616b3ff4243afc7f5d07ed0fd1f920fc4