Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2c916798ee4545…

MALICIOUS

PDF

79.0 KB Created: 2021-09-14 06:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a330f5c7a5cb779e7f81d9f71ca532f1 SHA-1: 4faec5f8d1b6e903f1dc60d5b79ef00fd8c61091 SHA-256: 9d2c916798ee454568234dc64cb37776959625a7ae67011b792b92fe8b33221b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs pointing to a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through the linked PDFs. The presence of embedded JavaScript suggests potential for further exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://kidsjeodo.com/images/files/90081532240.pdf In PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/kesawevor.pdfIn PDF document text
    • http://dobermanncz.eu/files/10658293651.pdfIn PDF document text
    • http://jagdrevier.hu/upload/images/file/62986339843.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/92050061743.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/87474052987.pdfIn PDF document text
    • http://poexali.org/static/image/_u/system/files/puwabejovafuliruroborodi.pdfIn PDF document text
    • https://tatvan.in/userfiles/file/numowisodo.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/49465270020.pdfIn PDF document text
    • http://coniperfumes.cl/js/ckfinder/userfiles/files/xajetarokoxurebagiz.pdfIn PDF document text
    • https://rawoctane.com/uploads/file/bogezuxaxumubo.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202109021702107716.pdfIn PDF document text
    • http://glttek.com/userfiles/file/85869719260.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d20cd1ebe---92871481519.pdfIn PDF document text
    • https://best-of-geldanlagen.de/userfiles/file/94437947761.pdfIn PDF document text
    • https://www.sterlingsez.com/ckfinder/userfiles/files/57960912509.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/jovasipipawagiweduxosiju.pdfIn PDF document text
    • http://ettorebelfioreliutaio.it/userfiles/files/nilotedive.pdfIn PDF document text
    • https://www.bnbtravels.com/ckfinder/userfiles/files/28827621106.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/bogosebovafonavawifup.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents/files/pokif.pdfIn PDF document text
    • http://allefrgycg.news-read.com/upload/files/lazil.pdfIn PDF document text
    • http://ailizia.com/userfiles/zekalekeneruk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=outlook+msg+to+pdf+converter+onlinePDF 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_off0000cf3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3E 11084 bytes
SHA-256: f783339e0c7a1c1a449279ee87ed838f15b670cd238e9e23d013536730a3e8e1
font_01_sfnt_off0000e8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EE 17300 bytes
SHA-256: 5a3be8df2a1ddd7197861ba5bcd39c43bd883e04700c630e50cfce8cc2585b54
font_02_sfnt_off000115dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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