Malicious PDF — malware analysis report

Static analysis result for SHA-256 733cb8be9301279c…

MALICIOUS

PDF

83.6 KB Created: 2021-09-16 18:10:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f7dfe50a84865c96a04ca6442ebba9df SHA-1: 7d1e2360154cf411ed567357b2662d6335c21712 SHA-256: 733cb8be9301279c8feb932962eec7e2a66523771cc248c9352b1f40ba3d5ac2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggests the document's purpose is to host a large number of links on disposable domains, likely for phishing or distributing further malware. ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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.
  • 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://smidgel.ru/uplcv?utm_term=ultron+note+8s+pro+price+in+india PDF link annotation
    • http://border-collie.ru/sites/default/files/file/sivosakaxubajowuz.pdfIn PDF document text
    • http://wirheiraten.de/images/file/rufisujevirodu.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/janizogivavun.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/vetigam.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/4305627467.pdfIn PDF document text
    • http://qiangka.com/ckfinder/userfiles/files/70407334913.pdfIn PDF document text
    • http://sayurmateng.com/contents/files/6571615074.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/bc73159076254e17861b7b4a6bbb4d6c/bunodupimujinirusakol.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/41013088698.pdfIn PDF document text
    • https://ruta.hu/ckfinder/userfiles/files/83854483619.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/fupawuvukefirorut.pdfIn PDF document text
    • http://xn--h1acbpobggs.xn--p1ai/data/files/97503051503.pdfIn PDF document text
    • https://arendic.cl/files/maxofesi.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/bapuf.pdfIn PDF document text
    • https://iieng.org/editor/ckfinder/userfiles/files/47661747495.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/77253168390.pdfIn PDF document text
    • http://hodoan.net/userfiles/file/nigezomerisojabowebosevon.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/65042664274.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/161347c6f36643.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/93971249679.pdfIn PDF document text
    • http://ahzycw.com/upload_fck/file/2021-9-4/20210904145837583642.pdfIn PDF document text
    • http://autostyle-japan.com/js/upload/files/98212970738.pdfIn PDF document text
    • https://srccaa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/56695924283.pdfIn PDF document text
    • https://mangalargalux.com.br/ckfinder/userfiles/files/rijezazusebegukitugasirud.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_off0000e405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE405 10724 bytes
SHA-256: e2ce9d567563e430b6de74e8faf3a1a1b75567fb51f7861f0e96d15678eac526
font_01_sfnt_off0000fcc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC0 17284 bytes
SHA-256: 6944fcc9155521e05dc38283b0603252ab81e36e9403141b8bbbe9b06c2969c1
font_02_sfnt_off00012914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12914 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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