Malicious PDF — malware analysis report

Static analysis result for SHA-256 e619514d96e05db5…

MALICIOUS

PDF

72.2 KB Created: 2021-09-11 20:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 12f895dccd7aba54835cdfbc0ea0545b SHA-1: 306564a46c85e2c7442bfab3f7428960edfaa202 SHA-256: e619514d96e05db585811760d639c1bfa3b9a3fc49bf0b89fc3463ecada985f7
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded JavaScript (T1059.007) is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://parfumzone.ro/files/file/86456076495.pdf In PDF document text
    • http://damvua.com/damvua/public/images/files/65785392794.pdfIn PDF document text
    • https://s-oil.hoakhanh.vn/uploads/image/files/60759514759.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136432903d3e---gemubozusovo.pdfIn PDF document text
    • http://cofetariafraguta.ro/UserFiles/file/60257966921.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es/ckfinder/userfiles/files/zalivovaris.pdfIn PDF document text
    • http://mikomisushi.com/uploads/files/50442024755.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/76830830313.pdfIn PDF document text
    • https://granitabrasive.hu/editor_up/75071317274.pdfIn PDF document text
    • http://nationalherbo.com/userfiles/file/18301170345.pdfIn PDF document text
    • https://ourguarantees.com/userfiles/file/xugawepefeko.pdfIn PDF document text
    • https://bursac.net/userfiles/file/75987191280.pdfIn PDF document text
    • https://ms02bet.com/contents/files/65023243365.pdfIn PDF document text
    • http://cudicio.it/images/file/61814702375.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/71abd40b3828ccbe9f4344ce7114eea4/xifexolufiwamazu.pdfIn PDF document text
    • http://www.performhabitat.fr/bundles/astadmin/js/ckfinder/userfiles/files/seremenowasetazaduf.pdfIn PDF document text
    • http://splhardware.com/UploadFile/file/2021090309203473499.pdfIn PDF document text
    • https://xebecdesign.com/xebec/userfiles/file/daguverile.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/36656924083.pdfIn PDF document text
    • http://gurgaontaxi.com/pa/trainstation/uploads/image/file/94253928935.pdfIn PDF document text
    • https://acrgruppe.de/userfiles/file/95768344460.pdfIn PDF document text
    • http://somkuthyoptika.hu/editor_up/ralodenonidujaxajebujir.pdfIn PDF document text
    • http://daegyung.kr/userfiles/file/20210909015848.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/37407430923.pdfIn PDF document text
    • http://synphabase.ch/upload/file/pijasijumofaxuj.pdfIn PDF document text
    • http://rioairporttransfer.com/ckfinder/userfiles/files/16076493358.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=how+do+you+delete+your+search+history+on+your+phonePDF 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_off0000b7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7EF 16104 bytes
SHA-256: e02482f7f563d1f7a0f1105e7b5adc35bbe27dee5b19a7a0c6ddc8bcb4fee244
font_01_sfnt_off0000e14a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14A 10900 bytes
SHA-256: edf600cb3fdb70875363b0077949b96881812dc182abaa5848e1e1eaa6865771
font_02_sfnt_off0000fa80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1