Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e09b0f4d432ef9…

MALICIOUS

PDF

71.9 KB Created: 2021-09-18 13:27:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 42d995a71dc9eb0814ac00487b41308d SHA-1: c36a115d487285701a64661f343711759762033d SHA-256: d3e09b0f4d432ef90438985ff4585f243945c7ce493d53587550cdc9430d525b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains numerous embedded URLs pointing to various domains, suggesting a phishing or link-farming operation. The presence of external URIs and a link farm heuristic indicates an attempt to redirect users to potentially harmful websites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://irlanc.ru/uplcv?utm_term=apk+pubg+no+data PDF link annotation
    • https://rajakeempat.com/contents/files/64882864802.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/61815283515.pdfIn PDF document text
    • http://hotelbasantresidency.com/uploads/xozabodovovisezodurutimim.pdfIn PDF document text
    • http://effektfilm.de/files/file/79929742717.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16141cbe04c7b3---83579963663.pdfIn PDF document text
    • http://etre-belle.su/images/file/tijorurubivaxipamaninamoz.pdfIn PDF document text
    • https://pannonfinanz.eu/editor_up/79092681250.pdfIn PDF document text
    • https://tasivn.com/upload/ck/files/kaluxozidugijujepul.pdfIn PDF document text
    • http://videocycling.info/files/file/26004318695.pdfIn PDF document text
    • http://audidalys.lt/ckfinder/userfiles/files/vuvonan.pdfIn PDF document text
    • http://prosefkuchare.cz/userfiles/divejavimosano.pdfIn PDF document text
    • http://como.gattinonimondodivacanze.it/themes/userfiles/files/nigorireluxatelolav.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fbfffdbc3d---lobetu.pdfIn PDF document text
    • https://ags-car.60km.com/upload/files/felozuzomavopibenaputi.pdfIn PDF document text
    • https://saya.ro/app/webroot/files/userfiles/files/54186701775.pdfIn PDF document text
    • http://geotersrl.it/file/55039503452.pdfIn PDF document text
    • http://teresachild.com/upload/files/digajusul.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/tonuwenesuxopop.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/163175100073.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/16148886358.pdfIn PDF document text
    • http://kaithompson.com/userfiles/file/47525268167.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/24222663833.pdfIn PDF document text
    • http://defhjdrjioo.friend-match.com/upload/files/bagujugivomuga.pdfIn PDF document text
    • https://tenutaedone.com/filesUploads/file/jaduwekodubobasifujowow.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_off0000b2d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D6 10340 bytes
SHA-256: 2d91458602fa10baedd617d13f548975a216d4ece11097277f54ba8ada03f59c
font_01_sfnt_off0000c9db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1ED 19172 bytes
SHA-256: 1abb01e57e7dd0b6c32a0671995143de387cfdefcd22944d2983f241f7ab64e8

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