Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad3462b2cd335bc…

MALICIOUS

PDF

84.0 KB Created: 2021-09-12 17:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f5693ab7059a912e7ca38178797bb9b3 SHA-1: d503282c95be8e0318ca7c90312d0c1da16d1661 SHA-256: fad3462b2cd335bcb936da3744133b9dc27cd5523b3d2771d91fff4ebca9a56a
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 malware delivery. The presence of embedded JavaScript points to T1059.007, and the overall nature of the document suggests it was delivered as a spearphishing attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://philabc.ru/uplcv?utm_term=resident+evil+3+apk+without+verification PDF link annotation
    • https://livres-arts.com/ckfinder/userfiles/files/rujodew.pdfIn PDF document text
    • http://geostudio.eu/userfiles/files/bosaweposegelujobujujup.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130bad8cfe91---30443847878.pdfIn PDF document text
    • http://orenprom.com/img/account/file/69640257989.pdfIn PDF document text
    • http://m-s-g.ru/userfiles/files/10604406679.pdfIn PDF document text
    • http://nextlab-semi.com/files/fckeditor/file/48641468017.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/fabemosazi.pdfIn PDF document text
    • http://www.satunatc.ac.th/ckfinder/userfiles/files/50199276819.pdfIn PDF document text
    • http://wyadonline.com/userfiles/file/4421749612.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/84597630793.pdfIn PDF document text
    • https://rumusjitu.com/contents/files/rulin.pdfIn PDF document text
    • http://regalmotors-jp.com/js/upload/files/ranalox.pdfIn PDF document text
    • http://psystems.gr/Administrator/uploads/userpics/OutPostImages/files/25726525746.pdfIn PDF document text
    • http://www.vegagastro.pl/upload/file/53494341860.pdfIn PDF document text
    • https://butchercurnow.com/img/shop/contents/gowujugabudojaterijetub.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/gixusukewapapepag.pdfIn PDF document text
    • http://bjsixiang.com/jingkelun/userfiles/files/20210903222609.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/enrjmrhg8dkegocf4gj0mdu4f5/lebadijamiwuzuvepozowo.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/53018946243.pdfIn PDF document text
    • http://bakineshr.az/ckfinder/userfiles/files/pebujivapepifopidojeju.pdfIn PDF document text
    • http://bouwbedrijfbouwheer.nl/userfiles/file/39955754693.pdfIn PDF document text
    • http://tele-klass.ru/i/upload/files/pinotuguta.pdfIn PDF document text
    • https://pabxlg.com/userfiles/file/dokararapijikuxupiv.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_off0000df85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF85 11280 bytes
SHA-256: 903de2e9c47127cc870a9f2cacd767b7711accaf7c4d18958c190f9fca5fe6c7
font_01_sfnt_off0000fa0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0C 18360 bytes
SHA-256: 28472f0d47c3ea6ab1f9a3c07a04dd5d54e48bba5a3c40a749a71af90ecd63e0
font_02_sfnt_off000129d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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