Malicious PDF — malware analysis report

Static analysis result for SHA-256 747841de8d9c06eb…

MALICIOUS

PDF

78.5 KB Created: 2021-09-13 19:17:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: abf1bb540a3b997ed3c40d0d4a339504 SHA-1: 52ad3324d5633ef1df4ba784388fdd23898d835d SHA-256: 747841de8d9c06eba43eeddf9e5e162961a8273e4d412efc84c7e846ff8925f0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. The presence of embedded JavaScript and numerous external URIs suggests the document is designed to redirect users to malicious websites or facilitate the download of further malware. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 https://queure.ru/uplcv?utm_term=crossover+apk+download+for+android PDF link annotation
    • http://gazdalkodjokosan.hu/img/userfiles/file/zized.pdfIn PDF document text
    • http://mybed.tw/uploads/files/202109050324285269.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/40507473030.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/b2472f5834bea89c8f141dfcce1c9334/zetekekoduwexizinen.pdfIn PDF document text
    • http://regalmotors-jp.com/js/upload/files/siwimovixipaxofaze.pdfIn PDF document text
    • http://ros.by/ckfinder/userfiles/files/bazeramojutexexizi.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/64274590260.pdfIn PDF document text
    • http://iccarrentals.com/files/file/dukibarusukolekezaweja.pdfIn PDF document text
    • http://mrybalko.ru/files/8354950139.pdfIn PDF document text
    • https://morethancars.eu/uploads/edytor/file/xasaputezobofikesifab.pdfIn PDF document text
    • http://iranjobex.com/cache/fck_files/file/90706355191.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/80263649206.pdfIn PDF document text
    • http://aeklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sexofaraxagiretuzozu.pdfIn PDF document text
    • http://soojuspilt.ee/files/file/wasibudabavizipuwajofefus.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613946bec478e---raduginimazajoredobogi.pdfIn PDF document text
    • https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/90200365053.pdfIn PDF document text
    • http://sevvalturizm.com/rsm/files/49056275509.pdfIn PDF document text
    • http://obkladlazby.cz/userfiles/file/23967047183.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/39112469967.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_off0000cf33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF33 10668 bytes
SHA-256: 552258cc1faab171c4205f45d32eac5f2b4a89c603f6002a622b778816be7b2f
font_01_sfnt_off0000e7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ffe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE2 17008 bytes
SHA-256: bad693cfd2d7bb890f942c91e011ba4fa2a41114b6e065c1ff32a788905b47c6

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