Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af86bb0e0ea951b…

MALICIOUS

PDF

72.3 KB Created: 2021-09-17 10:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a154a0a243acf030d285568f9e59bc2c SHA-1: 15250ade12c193b96ccead49c3028821a20ef4a2 SHA-256: 0af86bb0e0ea951b846a7f7caa4808e898a6b18ef69612be8742a652f64c53a2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous 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 initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://crewmak.ru/uplcv?utm_term=fastway+remote+control+apk+download PDF link annotation
    • http://bishnutoursandtravels.in/userfiles/file/30240725687.pdfIn PDF document text
    • http://test-immo.com/file/22017389117.pdfIn PDF document text
    • https://tresonance.org/uploadfiles/96490127710.pdfIn PDF document text
    • http://rtm-plus.com/ckfinder/userfiles/files/77736410355.pdfIn PDF document text
    • http://aucontecnologia.com/userfiles/files/45328022031.pdfIn PDF document text
    • https://truckforceone.com/upload/editor/file/tarepuxinedokegafigeres.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/89376600737.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/c3cf6331f6948b1e36e7ab559212e24e/zajetitasakes.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/12553489103.pdfIn PDF document text
    • http://rayocazar.com/images/elfinder-1.1/files/file/72023410053.pdfIn PDF document text
    • https://kildevangen.dk/files/sakumerodulit.pdfIn PDF document text
    • https://sitarasign.ir/data/file/kugelitipadetuga.pdfIn PDF document text
    • https://jurvamartin.com/userfiles/file/puvusolarivuwebibowutu.pdfIn PDF document text
    • http://gimnazjum-krasiczyn.pl/img/userfiles/file/25561003782.pdfIn PDF document text
    • https://nisahanpin.com/calisma2/files/uploads/35419272625.pdfIn PDF document text
    • http://www.artefuoricentro.it/js/lib/ckfinder/userfiles/files/panazezeduzeleloja.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/2l06c5iut5159mqjb863gf0s2v/5046345472.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/xoxefesafegobelaf.pdfIn PDF document text
    • https://ooobelkom.ru/ckfinder/userfiles/files/490145699.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/lutuxagefixujopemuzizowuf.pdfIn PDF document text
    • https://jasz-pap.hu/UserFiles/file/55235789977.pdfIn PDF document text
    • https://emailchopper.rockeit.com/userfiles/file/wutobedogadotewuguno.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/kofekuxalinoji.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_off0000b663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB663 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE75 17004 bytes
SHA-256: 16b2d621a8e49feb654b867bc38ddfe7a1e1b5f27deb6522cf632d91d2fc484e
font_02_sfnt_off0000fada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADA 10852 bytes
SHA-256: 4c82ecc85b337a1f6566de2fd492eea0a2b4171dc5310af91d839ebe8e4fef01

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