Malicious PDF — malware analysis report

Static analysis result for SHA-256 62d9028f0d649f5c…

MALICIOUS

PDF

76.4 KB Created: 2021-09-11 19:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: acd89f26b113887f644d948f54b38d03 SHA-1: 9d9b879be4a43454057314280e358f75ce449bad SHA-256: 62d9028f0d649f5c021077db1c158c23e74a95af48692a96731a458f7ee4899d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which host other PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM suggests a link farm designed to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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://ideviceplus.nl/app/webroot/files/userfiles/files/gerudiz.pdf In PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613082ec9702d---86766580791.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/depugupulefime.pdfIn PDF document text
    • http://revucue.com/ckfinder/userfiles/files/jokitiv.pdfIn PDF document text
    • http://zatacorp.com/upload/files/dogegagejepogiwuliw.pdfIn PDF document text
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/8384890517.pdfIn PDF document text
    • https://led7.ru/file/73683026984.pdfIn PDF document text
    • http://zhfangyuan.com/uploadfiles/files/xosawivilot.pdfIn PDF document text
    • https://kawanmto.info/contents/files/mobogatof.pdfIn PDF document text
    • http://dorrstrechy.cz/UserFiles/File/21143809413.pdfIn PDF document text
    • https://yptea.com/data/fckeditor/files/gurobimigurujezo.pdfIn PDF document text
    • https://principesgs.com/userfiles/file/11981197093.pdfIn PDF document text
    • http://indel.sk/userfiles/file/30911721420.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/27869080106.pdfIn PDF document text
    • https://cornwallstaffagency.com/userfiles/file/wetom.pdfIn PDF document text
    • https://zlatartopalovic.rs/files/7925151031.pdfIn PDF document text
    • http://xn--franzsischebulldoggen-lec.eu/userfiles/file/mewulamekesaxuxu.pdfIn PDF document text
    • https://grouptm2.com/contents/files/30276186449.pdfIn PDF document text
    • http://elfobchod.cz/foto/Image/file/bataxazusinirefuku.pdfIn PDF document text
    • http://branpc.in/ckfinder/userfiles/files/xizamexoxaj.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161384f38e822e---zivewolusupuke.pdfIn PDF document text
    • http://intertravel.hu/_user/file/bunodalupojusomu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=3d+pool+apkPDF 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_off0000ca89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29F 9856 bytes
SHA-256: f93b554dd7f6a2cc47c9b9239ccec073175fc3f361125cb2be50e06e168ab52e
font_02_sfnt_off0000f856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF856 17096 bytes
SHA-256: fab475201eb80f797fa882f7818e6b2020077a311371aaab935fa9334c922e6d

Open this report in the interactive analyzer, or submit your own file for analysis.