Malicious PDF — malware analysis report

Static analysis result for SHA-256 00094495fb921a3d…

MALICIOUS

PDF

76.5 KB Created: 2021-09-18 13:36:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c9d942c060adbeab260367393ce69347 SHA-1: cbf89efa5a367e78a33aa2600ee20e46c14fd28f SHA-256: 00094495fb921a3d27f5566ddb5f4e47e517a59d872c9f45c233551091df5b19
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to disposable hosting and form a link farm. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware delivery. The presence of embedded JavaScript suggests potential for further exploitation or payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://tarsiman.ee/files/file/xisizigulogofowosif.pdf In PDF document text
    • http://www.prunay-en-yvelines.fr/ckfinder/userfiles/files/72582596131.pdfIn PDF document text
    • https://fwstc.in/userfiles/file/zogunadejelozu.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/88236881241.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/13004950325.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/senaripuximuwu.pdfIn PDF document text
    • https://bem-sa.com/img/file/3285547270.pdfIn PDF document text
    • https://t2sc.me/userfiles/13608131848.pdfIn PDF document text
    • http://szilasfood.hu/pic_upload/files/82887129576.pdfIn PDF document text
    • http://villalapinetafavignana.it/userfiles/files/94730843876.pdfIn PDF document text
    • https://stvorki.ru/files/file/87339291811.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac7fe2aebc---dasezugaxakunugejiwo.pdfIn PDF document text
    • https://krossi.ru/images/content/files/xagemejugupufi.pdfIn PDF document text
    • https://ferest.ro/imagini_ws/tamulewob.pdfIn PDF document text
    • http://originalavto.ru/userfiles/file/runilum.pdfIn PDF document text
    • https://ist-lb1.istanajp.com/contents/files/bedajosaluduwulaf.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/16836207150.pdfIn PDF document text
    • http://linza-market.ru/upload/files/kopaganenasip.pdfIn PDF document text
    • http://compow.net/ckfinder/userfiles/files/setunupekeku.pdfIn PDF document text
    • https://lengthening-sldf.com/userfiles/file/xabarugufi.pdfIn PDF document text
    • http://skyrunarser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210905043919356345gjvgy0.pdfIn PDF document text
    • https://wasael.com/userfiles/file/83413676348.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135b562b8c59---84547900982.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=play+store+app+pc+windows+7PDF 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.netReferenced by PDF JavaScript
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseReferenced by PDF JavaScript

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4BD 17900 bytes
SHA-256: 3128f7c71898730296b50b73f85177bd0c936397407e3f5d624416358604ae9f
font_01_sfnt_off0000f334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF334 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4B 10760 bytes
SHA-256: 5c4267c685a2e40556095f1caf606fe255c3db8ef1b8b4e90e305631a17458d1