Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e557da498405b56…

MALICIOUS

PDF

82.0 KB Created: 2021-09-09 18:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 451003cf9196a7731999f2c603668109 SHA-1: 901444b426b110157b664deaa102999e3e02bb4f SHA-256: 4e557da498405b5642e6ebe44c6e8988b2ab5f2383a8162df584f9e7cc7ead75
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains, suggesting a link farm designed to redirect users to malicious content. The PDF's structure and the presence of external URIs indicate an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://eaupureinternational.com/userfiles/file/15585660151.pdf In PDF document text
    • http://syntrend.critical.tw/upload/files/6178086404.pdfIn PDF document text
    • https://avela.md/userfiles/file/nolidodevabevajot.pdfIn PDF document text
    • https://nhatngudongkinh.phapluatvietnam.com/upload/ckupload/files/16506863993.pdfIn PDF document text
    • https://nyig.com/files/file/likererizaluxoritarax.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130de81b8283---kizuzevul.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/fatikineduwejawasanaf.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16131571ec8cbf---gefoguxiredibogugo.pdfIn PDF document text
    • http://cosmikkino.ru/sadm_files/xatupezuvo.pdfIn PDF document text
    • https://www.larche-de-jules.fr/ckfinder/userfiles/files/22547449810.pdfIn PDF document text
    • http://peak-experience-japan.com/images/blog/file/13318505375.pdfIn PDF document text
    • https://gamma-electronics-eg.com/userfiles/files/jufaxusexebogapafijarujik.pdfIn PDF document text
    • http://tubesealer.com/uploaded/file/170946948561330356caad2.pdfIn PDF document text
    • http://kingkady.com/uploadfile/files/87746910627.pdfIn PDF document text
    • http://cuathepvangohaiduong.com/images/ckeditor/files/xowigutit.pdfIn PDF document text
    • http://dreamwith.gni.kr/ckupload/files/zurobe.pdfIn PDF document text
    • http://wellfoto.cz/pictures/files/wozazakajim.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/rilekifugibenogamumif.pdfIn PDF document text
    • https://asesoriagade.com/app/webroot/files/files/wejefedupilorifafosafowal.pdfIn PDF document text
    • http://nollve.com/img/editor/image/file/norisulunepepixunez.pdfIn PDF document text
    • http://www.kyousei-fukushi.or.jp/system/ckfinder/userfiles/files/dipumuzuxagigaruzuriz.pdfIn PDF document text
    • http://isspskola.lv/userfiles/files/pekamevunikeziputejalijop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=ps4+free+codes+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_off0000da9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B1 18512 bytes
SHA-256: 3bb37eec176efc8e94d806183a57930b876f44ab6063cbb7d0da80b1eeadae46
font_02_sfnt_off00012335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12335 10288 bytes
SHA-256: 7f4a32ed3709c8d88d5f0060823b18df1091f761384e31d2d1627bcd1a628dc5

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