Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a0726402b574817…

MALICIOUS

PDF

82.4 KB Created: 2021-10-18 01:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8860d76c122656c12785644dd7dbc130 SHA-1: 8cefe920beb452f16eef8d154e9ff792eafdb651 SHA-256: 0a0726402b574817c55774360e26133eb7e9f8dfc3d82da2f618ea9f047881e9
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs pointing to disposable domains, indicating a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection or delivery of further malicious content.

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 http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161411118f310f---23951994208.pdf In PDF document text
    • http://radyoislam.com/resimler/files/97560926713.pdfIn PDF document text
    • http://neboskreb-irk.ru/uploads/userfiles/files/kolubeputovi.pdfIn PDF document text
    • https://ahl2005.com/ckfinder/userfiles/files/97754493575.pdfIn PDF document text
    • http://finalstage.biz/js/upload/files/nofitarejufimizi.pdfIn PDF document text
    • http://qazaqbanki.kz/data/content/files/zekotasunofepezer.pdfIn PDF document text
    • http://www.cpnatacao.pt/backoffice/ckfinder/userfiles/files/fuvebubilokuganikev.pdfIn PDF document text
    • http://personal.sut.ac.th/chantira/port/ckfinder/userfiles/files/kesunaxidupuraso.pdfIn PDF document text
    • http://qdjshg.com/files/file/41902892833.pdfIn PDF document text
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/46656599503.pdfIn PDF document text
    • http://nanoscopy.ru/uploads/files/nemevagizonalade.pdfIn PDF document text
    • https://iphone-odklep.si/vsebina/nulagedapemerujiguboxo.pdfIn PDF document text
    • https://hoangvan.vn/wp-content/uploads/files/12289644813.pdfIn PDF document text
    • http://eventclub.pl/userfiles/file/72110939899.pdfIn PDF document text
    • http://dywin.com/uploadfile/files/wipazofiboluzonapanuworo.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/gewakubojo.pdfIn PDF document text
    • http://boras-sjuharad.boj.se/uploads/userfiles/files/zomuruzegapopitusona.pdfIn PDF document text
    • http://franceplus.fr/userfiles/file/jolatalesilidigemek.pdfIn PDF document text
    • http://dafangtour.com/fckeditor/userimages/file/16438538849.pdfIn PDF document text
    • http://bixenony.com/userfiles/files/38073728648.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ac1a6e5fd---fumozokuk.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/fijebipesinerubutezudan.pdfIn PDF document text
    • https://jordanadams.com/ckfinder/userfiles/files/54508720236.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/UsNeCLCzgYg/uplcv?utm_term=ripping+small+pieces+on+table+sawPDF 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_off0000dedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F4 10888 bytes
SHA-256: 1f7a8c7de00209ef3686a270daef07017b96fb3fc101d74f17c9e0ccae62952d
font_02_sfnt_off00010ff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF2 16984 bytes
SHA-256: 610c2c39b697d9d2ef06caac599e5c2e7baec360dbdd829111580bb0fe29b137

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