Malicious PDF — malware analysis report

Static analysis result for SHA-256 3959710015c22f54…

MALICIOUS

PDF

80.7 KB Created: 2021-09-09 12:25:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2fbab4c5954a20df2be500944000b27a SHA-1: 8c4ddab8b9f19be50b0fb4acc538a6119d7915ab SHA-256: 3959710015c22f5439d18dac3132d247ee9a8df7d450f1240bcbde7a309b305f
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 embedded JavaScript points to its use in executing malicious actions within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://oniceh.ru/uplcv?utm_term=logo+esport+maker+pro+apk+download PDF link annotation
    • https://noble-program.site/js/ckfinder/userfiles/files/91166891709.pdfIn PDF document text
    • http://ketoanaca.com/uploads/image/files/98052604110.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/79948091755.pdfIn PDF document text
    • http://lso-msm.fr/userfiles/file/tetur.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16133fee551db5---titazisogogulep.pdfIn PDF document text
    • http://hasadtemizlik.com/upload/file/94780603921.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161307b662d391---pipusanufefira.pdfIn PDF document text
    • http://spakimthi.com/upload/files/lidolomabazij.pdfIn PDF document text
    • http://another-partner.morefriendship.com/upload/files/vategixedonumatilevewumif.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea44f68f1a---nirezufobe.pdfIn PDF document text
    • http://contelex.it/userfiles/files/81306195715.pdfIn PDF document text
    • https://jobtiara.com/files/files/badikagojijegixep.pdfIn PDF document text
    • http://maiodi.com/userfiles/files/xulawejudipajovuzi.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/bonal.pdfIn PDF document text
    • http://diakmelo.hu/ckfinder/userfiles/files/vibejularogisofiz.pdfIn PDF document text
    • http://khonggianxua.samdigroup.vn/app/webroot/upload/files/tisizosutebis.pdfIn PDF document text
    • http://bangiyaparishadtoronto.ca/bpt/editor/uploadfiles/77606204796.pdfIn PDF document text
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/biwumamazilu.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/rasuvu.pdfIn PDF document text
    • https://jss-moms.si/upload/File/vixovikop.pdfIn PDF document text
    • http://www.haztartasigepszakuzlet.hu/pics/file/subasawitebana.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/rabufasefokalu.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_off0000d4e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E2 18196 bytes
SHA-256: a1171d1054c459532d4ec57ddc1f98c56eaa37f2487b1fd91c2eb762ada0ea49
font_01_sfnt_off00010455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10455 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6C 10776 bytes
SHA-256: 4763144835aab896e8dd364525c8d851a55899c98d4957921fe69bef19c9c22c

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