Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ca936f023adcea…

MALICIOUS

PDF

71.7 KB Created: 2021-09-17 14:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 289589e215f9eb2e24a4a78095ea06eb SHA-1: a001a88fac5f594b419525c7cb9b3eab738d6029 SHA-256: 67ca936f023adceab13d774169dec3d30dba41d7df0e2a8d4b3314dd3fdec175
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of JavaScript points to T1059.007, and the nature of the PDF suggests it was delivered as an attachment, aligning with T1566.001.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://drafthe.ru/uplcv?utm_term=atlantic+fleet+1.12+apk PDF link annotation
    • http://lighthouse-connection.at/myPix/file/78366540190.pdfIn PDF document text
    • http://miyisz.com/mingyi/images/userfiles/file/46001191609.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/pelago.pdfIn PDF document text
    • http://hstairan.com/FCKeditor/editor/filemanager/connectors/php/userfiles/file/24519439723.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/53229754454.pdfIn PDF document text
    • https://ienter.bg/files/52444940131.pdfIn PDF document text
    • https://clifestyle.net/uploades/userfiles/file/28857590051.pdfIn PDF document text
    • http://bugskin.org/userfiles/file/fasevexekibarozazidapun.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/rironifaxibaruvumifowe.pdfIn PDF document text
    • https://jmbarrenetxea.soinuenea.eus/files/galeria/files/sezufujofufevobaregisi.pdfIn PDF document text
    • http://citra.cl/userfiles/file/litumuv.pdfIn PDF document text
    • https://loyalangkorapartment.com/userfiles/file/befixisamekevadiraxas.pdfIn PDF document text
    • http://cautrucpalang.vn/webroot/img/files/89333058135.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16140a5ba82ae1---ramome.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/27068683823.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/34407616655.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/58962871355.pdfIn PDF document text
    • https://orsam.org.tr/paketler/ckfinder/dosyalar/files/72693198955.pdfIn PDF document text
    • https://xebecdesign.com/xebec/userfiles/file/96737804234.pdfIn PDF document text
    • http://fitviewer.info/files/file/43121991088.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/ca80d768b80392e2ec78982b4448a1de/66214690586.pdfIn PDF document text
    • http://carscaso.com/js/upload/files/lirogikob.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_off0000b654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB654 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6B 10396 bytes
SHA-256: fb90195f8c77bbd0709e9bde3d6085f25eaee10be2302e7406fb9ae1ccd58a8e
font_02_sfnt_off0000e62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62D 16752 bytes
SHA-256: 49ee055295731e033cb865c271aa5af1879386e1272348bea44c64dc46d1e6df

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