Malicious PDF — malware analysis report

Static analysis result for SHA-256 70ccb7a48d513c85…

MALICIOUS

PDF

83.5 KB Created: 2021-09-19 09:43:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c5e8fbb33da550600cd659d5ed4e7841 SHA-1: c8780367b24d1d2a8fe6a11f60fe97012e1a5bcd SHA-256: 70ccb7a48d513c85ce40dcd7efe52127fb8d2a9e61a43bb23771b8cc6e409b73
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms. The ML classifier strongly indicated maliciousness, and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic confirms the suspicious nature of the links. The primary attack pattern involves directing users to potentially malicious external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 4

  • 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://allytemp.ru/uplcv?utm_term=shadow+fight+2+cheat+level+max PDF link annotation
    • http://monteconsultants.com/image/upload/File/19525880934.pdfIn PDF document text
    • http://ramenhajimetustin.com/uploads/files/fasigifadawipasasu.pdfIn PDF document text
    • http://npcbalkan.net/ckeditor/ckfinder/userfiles/files/gugila.pdfIn PDF document text
    • https://mimpiindah2.com/contents/files/mizexelo.pdfIn PDF document text
    • http://www.anglometais.com.br/adm/Editor/ckfinder/userfiles/files/newutililorogurimawuvulad.pdfIn PDF document text
    • https://terminarz.online/kosmetyczka/krakow/files/jepevilobuwi.pdfIn PDF document text
    • https://maturana.cl/upload/file/jimel.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/16474432534.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f14e152c81---45867612943.pdfIn PDF document text
    • http://agisinfo.ru/uploads/content/files/26231303960.pdfIn PDF document text
    • http://ktai.lmg.jp/upload/file/wimifezinobufine.pdfIn PDF document text
    • http://investgeorgia.ge/userfiles/file/24778329553.pdfIn PDF document text
    • https://pisausakti.com/contents/files/64486688249.pdfIn PDF document text
    • http://faizleathergloves.com/userfiles/files/50353043532.pdfIn PDF document text
    • https://www.ksmt.edu.np/assets/ckfinder/userfiles/files/65789364373.pdfIn PDF document text
    • https://hklh.vip/data/attachment/file/32267370962.pdfIn PDF document text
    • http://geopraxis.it/userfiles/files/lefufifiwofarojakiz.pdfIn PDF document text
    • http://ximangsongthao.com/app/webroot/uploads/files/30636162600.pdfIn PDF document text
    • http://tomekorea.com/userData/board/file/96274457626.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/82849057255.pdfIn PDF document text
    • http://mcap.cz/images/uploadedimages/file/rekerisuminid.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/buzusotoromu.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_off0000e102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE102 11000 bytes
SHA-256: 04e52eba3e1082813af684f5b27a7d71999873df8f241b07a04de6d731abb451
font_01_sfnt_off0000fa7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11291 17716 bytes
SHA-256: b545cc2e1374cd44af5787f3455ef2859551aec7a2607da6884425991311c620

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