Malicious PDF — malware analysis report

Static analysis result for SHA-256 0624d32f4356bfbb…

MALICIOUS

PDF

69.8 KB Created: 2021-09-30 19:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: bf7eb443ebe0a31e4245bc0d39b528dd SHA-1: 78b301bcab30e230a608ec55de37c3c8f4cca8b0 SHA-256: 0624d32f4356bfbb71a3043b96299695756e51e45469436d3e4b2ec5bba06177
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links to potentially disposable domains, suggesting a campaign to distribute further malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://studiocariola.com/userfiles/files/vuvudevujugolipurodawanor.pdf In PDF document text
    • https://eownauto.com/uploadpic/files/potejefeb.pdfIn PDF document text
    • http://energyexcess.com/userfiles/file/jiwugapifajivenef.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16132c5de1da5c---sovugefamedoledatomowa.pdfIn PDF document text
    • http://landroverbh.com/ckfinder/userfiles/files/juduxumazowejopumo.pdfIn PDF document text
    • http://inbond-cn.com/userfiles/file/kutilijojerajoz.pdfIn PDF document text
    • http://ecompletecontact.com/ckfinder/userfiles/files/95169710150.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/jeteko.pdfIn PDF document text
    • http://nm-union.ru/ckfinder/userfiles/files/28888487670.pdfIn PDF document text
    • http://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/wedozidoduwikufel.pdfIn PDF document text
    • http://tctrack.vn/images/newtech/files/ruruliwejolibebevasam.pdfIn PDF document text
    • http://biomehl.com/images/content/files/pegobesedoxenufiko.pdfIn PDF document text
    • http://sk-massimo.com/js/upload/files/tovusatobivixoxezoji.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/15256348290.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/92843603797.pdfIn PDF document text
    • https://vroa.pl/chplusfiles/file/97963818447.pdfIn PDF document text
    • https://giltmorestukko.hu/ckfinder/userfiles/files/25803557450.pdfIn PDF document text
    • https://swalaya.in/userfiles/file/kibubozemirebarinapo.pdfIn PDF document text
    • http://ip-malkov.ru/uploads/files/58995166487.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/82208539196.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/17973181824.pdfIn PDF document text
    • http://transcash.com/ci/userfiles/files/nujikujadegigemoke.pdfIn PDF document text
    • https://myreply.mobi/snappshott/editor//file/raxololonamuvubadega.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=mc4+zero+hour+apkPDF 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_off0000b22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB22A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA3C 16028 bytes
SHA-256: 84a69f5670ef413da9a65832aefac3cffb3dddedf102c6c8c143d30b14247448
font_02_sfnt_off0000f22f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22F 10288 bytes
SHA-256: 0f6b728db508d1debbcb28604972b39fc1ed3a4398167b0d2727fdd73ca4be48

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