Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b5e775d2dc444ab…

MALICIOUS

PDF

70.0 KB Created: 2021-09-27 16:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2d2744dfaa7f72afc989358e2af41857 SHA-1: f33b00505a0dda4e95dbe08be5b9c9f5a9c4abbd SHA-256: 7b5e775d2dc444ab2faefb00cc86089f82ab2ebd26b9a02d90edeb4dabf92057
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://medvor.ru/uplcv?utm_term=messages+android+for+web PDF link annotation
    • https://intrastorg.com/userfiles/file/43947018958.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/10489383793.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/fosikaxikamodolodasuxetux.pdfIn PDF document text
    • http://hcstonetw.com/uploads/files/202109221326596102.pdfIn PDF document text
    • https://frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/fewunuraxateraw.pdfIn PDF document text
    • https://cicasoftavukatwebsitesi.demowebsiteleri.com/upload/files/15983295213.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/15383502293.pdfIn PDF document text
    • http://www.thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/77232711498.pdfIn PDF document text
    • https://postele-z-masivu.sk/ckfinder/userfiles/files/49531420005.pdfIn PDF document text
    • http://195exim.com/datas/files/84682993895.pdfIn PDF document text
    • https://kawanmto.org/contents/files/95126512772.pdfIn PDF document text
    • https://360clothing.indicsys.com/home/www360cl/public_html/uploads/images/files/25108895315.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/99778414608.pdfIn PDF document text
    • http://kabaretyimpresariat.pl/Upload/file/birovasuxevulazu.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/nijajijemelesul.pdfIn PDF document text
    • http://koddous.com/userfiles/file/74916653802.pdfIn PDF document text
    • http://actlogistic.vn/upload/editor/files/ridedupim.pdfIn PDF document text
    • https://inoxquochoang.com/app/webroot/files/images/pages/files/xurip.pdfIn PDF document text
    • http://kleinschadenexperte.com/userfiles/file/buvuwevelomavaj.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138e7198f45c---15694463020.pdfIn PDF document text
    • https://ccar.host168.com/data/fckeditor/files/sogaz.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/m06oplfueods03sivjmi5gjogt/rivasimabubejex.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_off0000b16a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB16A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC97C 15976 bytes
SHA-256: b09d98d4897736689d645ef24b4edb9bec3a8b3a6a5c07dab478a67726dc1eb5
font_02_sfnt_off0000f221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF221 10604 bytes
SHA-256: de03b7ed9f3c87347e8d48aa92fa421ec8c77e17a132cceafb505cda28d5ce44

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