Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f95df6bb7f8e9d…

MALICIOUS

PDF

82.0 KB Created: 2021-09-09 20:22:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 64f0abc5f5451645bdea4d72ed021e4d SHA-1: 4d065181161797e1e12d9da8e51442cd406a13e4 SHA-256: 76f95df6bb7f8e9dbadefbd001e9ec11229766c433c12809860908c1b0321e0c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a link farm with numerous external URIs pointing to unknown PDF files on disposable domains. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a high likelihood of this being a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://e-restauracion.com/app/webroot/files/uploads/files/dawisezodujubur.pdf In PDF document text
    • http://canxetaidientu.com/images/file/nusiriwidakimizuwe.pdfIn PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/vomipoze.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/a083ksfnmfg8520f28cvf5a7v2/litatokugupumuxijofakar.pdfIn PDF document text
    • http://annassteen.com/ckfinder/userfiles/files/bibafadalimujulewazoge.pdfIn PDF document text
    • http://mabo-meccanica.eu/userfiles/files/7123409359.pdfIn PDF document text
    • https://drjou-vc.com/upload/files/jenebanofovogi.pdfIn PDF document text
    • http://flex-link.cn/uploadfiles/files/libuzasazusopixote.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/bubedejogasanazuve.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/nadivemujanuwukira.pdfIn PDF document text
    • http://www.fred-robin.com/ckfinder/userfiles/files/buwojipuke.pdfIn PDF document text
    • http://www.videobezopasnost.ru/ckfinder/userfiles/files/konetewubulidotepot.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136b602a5ffb---muliboboxi.pdfIn PDF document text
    • https://www.q-jin.ne.jp/ckfinder/userfiles/files/63888710889.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/78658877404.pdfIn PDF document text
    • http://stamforgtechnologies.com/uploads/2950868213.pdfIn PDF document text
    • https://tommytest.dish1314.com/data/html_editor/files/zapemiwinewazavupemoj.pdfIn PDF document text
    • https://sledovani2.gpshlidac.cz/www/userfiles/files/kuzadiremowujafogexufog.pdfIn PDF document text
    • http://pate4me.com/userfiles/file/57003107915.pdfIn PDF document text
    • http://onlinetalk.jp/app/webroot/img/fckfiles/file/lanonolagarada.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/99039120007.pdfIn PDF document text
    • https://phuquiland.com/upload/files/2225756395.pdfIn PDF document text
    • http://consade.com/userfiles/file/40295778961.pdfIn PDF document text
    • http://www.binghan.my/userfiles/file/55209320824.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=disk+digger+pro+free+downloadPDF 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_off0000d949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD949 18436 bytes
SHA-256: aed315ad5176c826bbcf29bd67d5c7d625b46007a8c0d339d9be18ab9f02b39f
font_01_sfnt_off00010980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10980 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12197 10752 bytes
SHA-256: f40353891ee064cba27dd1bdbcc3f5919a91daf7327b5cd6fbef530deae437d2