Malicious PDF — malware analysis report

Static analysis result for SHA-256 06da13259dc3cfff…

MALICIOUS

PDF

68.6 KB Created: 2021-09-09 04:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 358c4c06751cd6cd61876d277d932096 SHA-1: 371ab1d999e0bbe979e089c80cb0015519d99158 SHA-256: 06da13259dc3cfff42b8680638eefd3bde4b0be3e08966aedd752daa37d54ce6
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable link. The heuristic 'PDF_IMAGE_LURE' indicates a common tactic where a screenshot hides a malicious button. The numerous external URLs, particularly the one on 'smidgel.ru', suggest a redirection to a site designed to deceive the user, likely for credential harvesting or further malware delivery. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 0 text block(s), carries a click-outward action, and is only 68 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://smidgel.ru/uplcv?utm_term=gta+vice+city+original+download+for+android PDF link annotation
    • http://kocavietnam.com/upload/files/90190012207.pdfIn PDF document text
    • http://yacpa.org/yacpafiles/file/xuzidogozus.pdfIn PDF document text
    • https://tattica.byespresso.com/app/webroot/files/upload/files/menopoxelowus.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/23773009558.pdfIn PDF document text
    • https://matricula.arendic.cl/files/kizidil.pdfIn PDF document text
    • https://sindicav.com.br/ckeditor/ckfinder/userfiles/files/40512890490.pdfIn PDF document text
    • https://tempatpasang.com/contents/files/64714826559.pdfIn PDF document text
    • http://www.sudeshnamaulik.com/fckimages/file/16798127871.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/91160375318.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/95108208303.pdfIn PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/12075267876.pdfIn PDF document text
    • https://anzhero-sudzhensk.verlauf-ekb.ru/admin/ckfinder/userfiles/files/kizixizagogud.pdfIn PDF document text
    • https://ysh.my/userfiles/file/pavunobibowolik.pdfIn PDF document text
    • https://biocoils.com/img/file/309922280.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/sojezozuzugabodilexe.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/6216381591.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/nasoxomitam.pdfIn PDF document text
    • https://derey.nl/app/webroot/files/userfiles/files/kisaw.pdfIn PDF document text
    • https://strefaokazji.pl/uploaded/file/64569852131.pdfIn PDF document text
    • http://marketingnews.fr/images/file/7311367829.pdfIn PDF document text
    • https://network-italia.it/file/96171774078.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/161365de74dd08---wefubozegapokepuw.pdfIn PDF document text
    • http://hiroshima-teishaku.com/userfiles/file/mobavufesi.pdfIn PDF document text
    • 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_off0000b0cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E6 10788 bytes
SHA-256: dad1d246efa0cab60759fe3e758000f7abf57916619b99ef3faadcacfc5945f6
font_02_sfnt_off0000e1c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C4 14060 bytes
SHA-256: 975b9bee38569f08a0e24d64f8e8650bc75267f9e86f6e7b2595979c6a17da60