Malicious PDF — malware analysis report

Static analysis result for SHA-256 7629a207a320bed9…

MALICIOUS

PDF

70.0 KB Created: 2021-09-26 13:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: d091012183b270a50dc20728dc1864ca SHA-1: c8bb503bb141e1f60109a6ffa2f708d89f2f4fc0 SHA-256: 7629a207a320bed98509a02d6c83df9118f1ba2433436beedeff525ac0d3c474
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://jackinthegym.com/uploads/files/202109071201206065.pdf In PDF document text
    • http://mariondhuique-mayer.com/data/file/43315795528.pdfIn PDF document text
    • https://msiutilities.net/documents/vuruzutujumujoraxoral.pdfIn PDF document text
    • https://ssekolkata.com/ckfinder/userfiles/files/91084478419.pdfIn PDF document text
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/98682635740.pdfIn PDF document text
    • https://transport.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/bijevagugogu.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/gazunej.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/89243238406.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/33cb3a7945dc6b0f087fb6e8a5d0c41c/53282216795.pdfIn PDF document text
    • https://abriganature.centralcms.cloud/galeria/files/kirobugazefejub.pdfIn PDF document text
    • https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/60903230163.pdfIn PDF document text
    • http://ruresept.ru/files/file/10228774168.pdfIn PDF document text
    • http://boissee.fr/userfiles/file/97271872739.pdfIn PDF document text
    • http://dpholding.ru/uploads/files/70625428622.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/mesusosixixaf.pdfIn PDF document text
    • https://strechybenesov.cz/content/xemelewodozewage.pdfIn PDF document text
    • http://ancient-theater.gr/media/file/82536930486.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/81451080499.pdfIn PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/rinusalarumabu.pdfIn PDF document text
    • http://travel-door.com/userfiles/file/xelagasobiwuza.pdfIn PDF document text
    • https://goldenlinejsc.com/userfiles/file/81344055375.pdfIn PDF document text
    • https://adamant54.ru/userfiles/files/36134253166.pdfIn PDF document text
    • http://all-vehicle.net/js/upload/files/zolaneganumu.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/simodofideb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=sonic+generations+download+android+apkPDF 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_off0000afdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F3 10944 bytes
SHA-256: d612f630a97cf201d6bb53528a37ec1fca7b97fcc84e526576e729e5159d89f3
font_02_sfnt_off0000e14a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14A 16072 bytes
SHA-256: 4ba3676aa89d117198d36a3859667b8d48c035507668568ea61852993e763cb7

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