Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b269a395dc09b1c…

MALICIOUS

PDF

69.8 KB Created: 2021-09-21 05:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 71fb28a30f43e1dd342838a53256aac5 SHA-1: 46d798c07923033c6347cb5b1f737b4212812ed8 SHA-256: 1b269a395dc09b1c2970a19a12feff86c427cf254fd88f181f07c278bef6c301
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The numerous external URIs, many pointing to PDF files on disposable domains, suggest a link farm or phishing campaign designed to redirect users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://robbes.nl/media/files/2028788502.pdf In PDF document text
    • http://dogwarts.ru/sites/default/files/file/93884366041.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/28328535784.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/89415583708.pdfIn PDF document text
    • https://shirbandifelt.com/userfiles/file/37832829120.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/2009895397.pdfIn PDF document text
    • http://rtm-plus.com/ckfinder/userfiles/files/sisimitegok.pdfIn PDF document text
    • https://membermimpi.com/contents/files/zinonepadidutevamas.pdfIn PDF document text
    • http://hykylalumni.org/userfiles/vubozidisolewigowoda.pdfIn PDF document text
    • https://learningsolution.ca/userfiles/files/nenabigafopapisa.pdfIn PDF document text
    • http://beergolfers.com/blog/images/file/556864900.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613da7d5e0868---vevemamu.pdfIn PDF document text
    • http://kingsap.com/file_media/file_image/file/39648947061.pdfIn PDF document text
    • https://mhreng.com/userfiles/file/27680689783.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/88700937021.pdfIn PDF document text
    • http://www.performhabitat.fr/bundles/astadmin/js/ckfinder/userfiles/files/fusajukuda.pdfIn PDF document text
    • http://careerpathrecruitment.com/swapscan/app/webroot/js/ckfinder/userfiles/files/58066439749.pdfIn PDF document text
    • http://jia-longsofa.com/uploadpic/jialong151126/files/202109210807464070.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/36270799601.pdfIn PDF document text
    • https://ikomsolutions.com/admin/userfiles/file/govabuj.pdfIn PDF document text
    • http://gelikonline.ru/content/Files/25254562019.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=draw+and+label+the+digestive+system+of+humanPDF 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_off0000b24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB24B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA62 11308 bytes
SHA-256: 16c6cf2c4899c25d1174b8fdc95b983362b5f6aa5f33fb6219c7676ef24e1820
font_02_sfnt_off0000e48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48F 14812 bytes
SHA-256: d784b76825e03b46bab9aafd44518ab2aed4ceea6d37878ffb7a676f10fcd904

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