Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a192b1a5a3c3f08…

MALICIOUS

PDF

79.8 KB Created: 2021-10-17 04:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ed8a7b31f537245ab8645fb03ea8371e SHA-1: 0436c7e74b529f10aa12cc8d707033d15d13454f SHA-256: 7a192b1a5a3c3f089d09032cc3546efb73bcff9bf1752a0616815173af3c2ace
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous external links, many on disposable domains, suggests a phishing or link-farming operation designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://lapawan15.com/shop/fck_file/file/ziwisolovogupobe.pdf In PDF document text
    • http://latiendasegura.com/contable_prueba/userfiles/file/83096668416.pdfIn PDF document text
    • https://whatshoulditcostme.com/userfiles/file/8245396888.pdfIn PDF document text
    • http://preprod.app-nomads.com/ugecam/admin/ckfinder/userfiles/files/korubokoxitawunabadilat.pdfIn PDF document text
    • https://krafteco.ru/uploads/files/golemamiweziwiso.pdfIn PDF document text
    • http://studiofagiani.eu/userfiles/files/97998736602.pdfIn PDF document text
    • http://d-innovation.com/upload/files/39315602393.pdfIn PDF document text
    • http://ldksolar-officialliquidation.com/userfiles/files/78889411850.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/buwefaluzo.pdfIn PDF document text
    • https://madeirashopping.com/userfiles/file/niluderifopomuzakisimoza.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613b49bed4948---keligutuwepazakinir.pdfIn PDF document text
    • http://jolanyee.com/upload/files/202109101851524093.pdfIn PDF document text
    • http://autowagon.it/userfiles/files/zowamidav.pdfIn PDF document text
    • https://ladulceseguros.ar/noticias/fckeditor/file/63638420465.pdfIn PDF document text
    • http://algarestofos.pnh.pt/js/ckfinder/userfiles/files/82714332277.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/96244238582.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/6a72e02c43a051791573eee66bd0ab19/19914367968.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/fuxolufexagazupujix.pdfIn PDF document text
    • http://boston.pl/fck_pliki/file/pabowo.pdfIn PDF document text
    • http://tatagz.com/uploadfile/files/wesikupuwaxojerezute.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/2412389010.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/64318999451.pdfIn PDF document text
    • http://sperrincaravans.com/images/file/xowanimeketor.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/BcFPVxLj4jw/uplcv?utm_term=microwave+installation+manualPDF 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_off0000d50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50B 10636 bytes
SHA-256: 6164e8ae3e62c55e24138a18291e95d1b8ca45d18d58af8bc963c99952e92206
font_01_sfnt_off0000ed75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED75 17360 bytes
SHA-256: 645e7f86886ce406b7b4c69f9c940ca25e0635cef1fc011eec44e12c6c8d6c08
font_02_sfnt_off0001199a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1199A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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