Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1ca026abc6fd3fa…

MALICIOUS

PDF

69.5 KB Created: 2021-09-29 04:27:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c83ae9355c10c8a1b2bca1e4f150fead SHA-1: dc9539127d24855f4ac2420670c461dd3d2ab941 SHA-256: e1ca026abc6fd3fa56596a72014db0bb032aa96f792e5267a5162abab21a6a4c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The presence of numerous external URLs, many pointing to PDF files on various domains, suggests a phishing or malware distribution scheme. ClamAV detection and ML classification further confirm its malicious nature, likely as a phishing lure or a downloader for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://kitapkaplama.com/upload/ckfinder/files/jatezagemuduxiwajemuvufu.pdf In PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/xires.pdfIn PDF document text
    • https://songod.vn/uploads/image/files/botiviratufa.pdfIn PDF document text
    • http://jainfarms.com/uploads/76253546949.pdfIn PDF document text
    • http://jadeite.ru/images/file/giviwolopakovolaneku.pdfIn PDF document text
    • http://khonggianmang.com/upload/files/lokoxepar.pdfIn PDF document text
    • http://viswinkelindex.nl/images/uploads/nuxaxebufeduworumadinuzij.pdfIn PDF document text
    • http://eurekaelearning.com/upload/news/file/vomefigavarageledoz.pdfIn PDF document text
    • https://asesoriagade.com/app/webroot/files/files/52812762557.pdfIn PDF document text
    • http://hmsendo.pl/uploads/editor/file/79965053259.pdfIn PDF document text
    • http://tsraccountants.nl/mailing/images/photo/file/kejesubagezi.pdfIn PDF document text
    • http://directartdeal.com/uploaded_files/userfiles/files/89017777630.pdfIn PDF document text
    • https://blokhol.com/upload/files/bofujod.pdfIn PDF document text
    • https://unovosti.tv/ckfinder/userfiles/files/71950664059.pdfIn PDF document text
    • https://www.pharmawell.eu/ckfinder/userfiles/files/wixanugejujojinafazena.pdfIn PDF document text
    • https://igraonica.me/userfiles/file/mobuj.pdfIn PDF document text
    • http://www.ctnphrae.com/ckfinder/userfiles/files/masoxaw.pdfIn PDF document text
    • https://www.travelknowhowscotland.co.uk/assets/js/ckfinder/userfiles/files/nawezi.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/vewazokixamogogufijemef.pdfIn PDF document text
    • http://cichanski.com/Upload/file/39849405996.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/2jk53c31ifc5nc9mem7ref25vd/87552816975.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/68248625693.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/zoxomikososa.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/96007675761.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=canon+in+d+guitar+easyPDF 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_off0000aff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC809 15976 bytes
SHA-256: bac64b3e20d9101c3a3dceae150d968db4153a860d3d45b27973d52d9ec431ec
font_02_sfnt_off0000f0b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B7 10620 bytes
SHA-256: 2855a30851c0492e2aee40a42f1300c2b99b0bff039f4f608f87237492c4d502

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