Malicious PDF — malware analysis report

Static analysis result for SHA-256 294e26e42275026a…

MALICIOUS

PDF

69.4 KB Created: 2021-09-16 05:04:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a445216e3dda8b4be1251fef2148fd64 SHA-1: df91e4d4b80a54e1a501d0cf58998c63cf9fd623 SHA-256: 294e26e42275026a0e11b023f7e55542af40866bab1e56544e40c88850b655ec
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical for phishing campaigns. It contains numerous external links, many pointing to disposable hosting, suggesting an attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further malware or conducting phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • 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://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/1365614473.pdf In PDF document text
    • http://dermatologomiguelgallego.com/miguel/fck/file/70595275209.pdfIn PDF document text
    • https://rhuyscampingcar.fr/images/files/2816720422.pdfIn PDF document text
    • https://ap-qatar.com/userfiles/files/64024160193.pdfIn PDF document text
    • http://winhazel.com/indigo/ckfinder/userfiles/files/batupex.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/tezijifatevomujeturafi.pdfIn PDF document text
    • https://gornjastubica.hr/files/tikidotozonakojinilurud.pdfIn PDF document text
    • http://kientam.info/uploads/userfiles/file/19597397307.pdfIn PDF document text
    • https://miraclechuppahs.com/userfiles/file/14850926349.pdfIn PDF document text
    • http://signauction.net/userfiles/file/84211782298.pdfIn PDF document text
    • https://alternativecarrepair.nl/userfiles/file/83443897762.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/87397165595.pdfIn PDF document text
    • http://konditsionery-zheleznodorozhnyi.ru/upload_picture/file/74673715034.pdfIn PDF document text
    • http://immobilier-valence-agen.com/userfiles/file/lojesodopokoberev.pdfIn PDF document text
    • http://gdlejia.com/uploadfile/files/20210909_085206.pdfIn PDF document text
    • http://hejia-ele.net/upload/joteg.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/dd07516a60ab3af901c25f41f09a805b/47878205401.pdfIn PDF document text
    • https://mar3ol.com/Files/files/fusuloruleperedaforir.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/lalobasenikepolepok.pdfIn PDF document text
    • http://pactolous.hu/upload/file/vinorebefep.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380a3928994---rapefikujubefir.pdfIn PDF document text
    • https://toananhmedical.com/uploads/files/titosuvikojujavusutefa.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/buxekefuvavuvadibor.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/31021161369.pdfIn PDF document text
    • http://thaifilmind.com/UserFiles/file/94809328788.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/modat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=download+vpnify+androidPDF 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_off0000b4c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4C3 14176 bytes
SHA-256: d85febb08f8f61753d938ee95e9311528815e399cfee3acaf97b63af0f3339a0
font_01_sfnt_off0000d829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD829 10360 bytes
SHA-256: f6cccabb7a464130f501493285dc1e386882be2add6754349902e1a34cfc940d
font_02_sfnt_off0000efa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1