Malicious PDF — malware analysis report

Static analysis result for SHA-256 0864c506d6530889…

MALICIOUS

PDF

76.8 KB Created: 2021-09-16 20:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3568b664a8b41640e30c69524027ead2 SHA-1: b432771b6c4840aed7aff9a49483ff9eb6e2bad7 SHA-256: 0864c506d6530889c2267a92e20c12653a99a60fb2104b7413b116c4ff531ee4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The presence of numerous external URIs, many pointing to potentially compromised or disposable domains, suggests a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 http://creativeindustries.ru/uploads/userfiles/file/79926565596.pdf In PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/52147902041.pdfIn PDF document text
    • https://sapsda.org/SapmaUserfiles/file/15257294762.pdfIn PDF document text
    • https://locktactyuma.com/ckfinder/userfiles/files/55952770534.pdfIn PDF document text
    • http://trumoi-khutrung.com/upload/files/28689433089.pdfIn PDF document text
    • http://www.ernakulamarchdiocese.org/www/js/ckfinder/userfiles/files/82602088495.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/62089965525.pdfIn PDF document text
    • http://sasmedm.com/www/js/ckfinder/userfiles/files/43702992425.pdfIn PDF document text
    • http://liceoadultos.juniorcollege.cl/userfiles/files/96481412944.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f214e20e64---tofav.pdfIn PDF document text
    • https://defi128.phpascal.com/userfiles/files/jekinewuxeni.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name/files/50643977841.pdfIn PDF document text
    • http://www.arborvitae.cz/ckfinder/userfiles/files/16253110073.pdfIn PDF document text
    • http://oshcongregation.com/userfiles/file/digazogogumotipivuzef.pdfIn PDF document text
    • http://coquicart.com/ckeditor/ckfinder/core/connector/php/uploads/files/wulemazabaxubesurekugi.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/xenimamodoxevonukamazabat.pdfIn PDF document text
    • http://obkladacstvikolar.com/content/wexurasirajog.pdfIn PDF document text
    • https://autonoleggioassereto.com/file/21163466698.pdfIn PDF document text
    • https://quasar.mago.ro/ckfinder/userfiles/files/27192558683.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/ba4aece08e1cdae2d46616cb34d24137/51972295919.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/zilutavuravasuvugelilo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=turbo+league+mod+apk+2020PDF 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_off0000c64d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC64D 17412 bytes
SHA-256: 0f2315ad52c38978a3b12de03df622395748272927f23265a837d104e9c9b226
font_01_sfnt_off0000f3fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FC 10808 bytes
SHA-256: e9e471d6a7801f2dc30627d817e56dfcc0e4b3041148aa4d73758b2970fd55b8
font_02_sfnt_off00010c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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