Malicious PDF — malware analysis report

Static analysis result for SHA-256 1303fc9f3a52536f…

MALICIOUS

PDF

91.7 KB Created: 2021-09-23 15:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 1e10b285eb33074ab1480c7561da02be SHA-1: 62132921609e258f57677a43f39e1f874a6f3218 SHA-256: 1303fc9f3a52536f0fd0c7969b943e4a59c9e60f8b6da5b348766217d9948b4b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript, which is often used to execute malicious code or redirect users to phishing sites. The presence of numerous external URIs, many pointing to potentially disposable domains, further supports the likelihood of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://oriental-kitchens.com/userfiles/files/fezulexugoforufafamugov.pdf In PDF document text
    • http://docando.es/js/ckfinder/userfiles/files/48668839577.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/93056884927.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/79238646574.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/2539857721.pdfIn PDF document text
    • http://umhouses.com/uploads/files/55723124735.pdfIn PDF document text
    • http://tecresconsolidamentorestauro.it/fck_data/file/91027406306.pdfIn PDF document text
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20210905_F04F45057464EC5C.pdfIn PDF document text
    • https://8foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/87259376153.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/detaxugetowuwobeko.pdfIn PDF document text
    • http://crmloccitanecr.com/campannas/file/gitudonomujagulepi.pdfIn PDF document text
    • https://www.leasing.net.in/ckfinder/userfiles/files/dokotesovoxibonef.pdfIn PDF document text
    • https://clearpatth.com/userfiles/file/83216161070.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/watowepoxuzano.pdfIn PDF document text
    • https://mmeasar.com/mmeasarfiles/file/mifisepozesazivivefekilo.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/zikatubogukavikofexobukim.pdfIn PDF document text
    • http://toitureetfacade.fr/data/Files/nulovolijuta.pdfIn PDF document text
    • https://hsse.cl/files/moferavaruzimo.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///80575181703.pdfIn PDF document text
    • https://ruh-center.ru/userfiles/file/sepotugixapovuximukobe.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/161412153841db---fides.pdfIn PDF document text
    • https://kermanrooz.com/img/files/nibuwubobawere.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/161301f4c24388---19929740800.pdfIn PDF document text
    • http://revistaspontan.ro/assets/ckfinder/core/connector/php/uploads/files/sisuxovidu.pdfIn PDF document text
    • https://rent-1.es/ckfinder/userfiles/files/sixijerisafupu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=free+movie+apps+for+firestick+2020PDF 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_off00010198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10198 10868 bytes
SHA-256: ada9d3c8776d11c64c6da74a4cda48ae1ae81f13047ab5b95c3fe4f9143b4b9a
font_01_sfnt_off00011ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD7 17520 bytes
SHA-256: 9f7f805f2fc61a65a07c13b3a0b280b1e42f6629a698fd5c1d1a762b9d1eee48
font_02_sfnt_off000148ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1