Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb9df471a872d8d1…

MALICIOUS

PDF

69.0 KB Created: 2021-09-27 00:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9a4191c7a2c8673037b183bbdd6de1b9 SHA-1: e634c365f9ae23c51aad95715efadee5f06efc93 SHA-256: eb9df471a872d8d1038a655a3ba1a5e607bf60ba35f102651ef91e43e0cdbade
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. This script likely redirects the user to external URLs, as indicated by the PDF_URI and EMBEDDED_URL heuristics, which point to a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware.

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 https://dunaweb.co/bg_image/files/mobelulava.pdf In PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1a9fbe2a2---kosudimumerarimi.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/rijudo.pdfIn PDF document text
    • https://pre-www.bridge-college.com/uploaded/ckeditor/files/59448632489.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/satorefogiwebogabonofu.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///22924895576.pdfIn PDF document text
    • http://aotwresort.org/ckfinder/userfiles/files/59898398555.pdfIn PDF document text
    • https://desarrollostecnologicos.condotiero.com/imagenes/imgeditor/file/rafijipamugegu.pdfIn PDF document text
    • https://eltonltd.ru/sites/default/files/uploads/81473796701.pdfIn PDF document text
    • https://holcom-wd.com/webroot/img/files/puworufenewosuvo.pdfIn PDF document text
    • https://network-italia.it/file/misanaralexikolumusol.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/22689647029.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/83583233500.pdfIn PDF document text
    • http://eatoceanic.iorderfoods.com/uploads/files/pedakojenowetodizeraxe.pdfIn PDF document text
    • http://cascinamana.it/userfiles/file/janirusevuzizuxasowekus.pdfIn PDF document text
    • http://dallard.fr/ressource/site-image/files/vabavaxarimutijujigidora.pdfIn PDF document text
    • https://delaneyllc.cfonewsletter.com/ckfinder/userfiles/files/19042323193.pdfIn PDF document text
    • http://noahmission.org/dataroom/file/77980608253.pdfIn PDF document text
    • http://instit.ac/ckfinder/userfiles/files/57399958440.pdfIn PDF document text
    • http://almawred-sy.com/files/adminfiles/files/pefipituxurelete.pdfIn PDF document text
    • https://comillaspostgrado.es/userfiles/file/pekagepufumojoxolexagataf.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/96c4aef41d95eb851341f1e5335ed9c1/velawe.pdfIn PDF document text
    • https://vnycc.com/userfiles/file/43929106180.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=best+free+app+store+for+androidPDF 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_off0000b0a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0A3 15132 bytes
SHA-256: b75629a476ca27d2ea8d42b7d04f192a1d2df67bf8e8ab2adb295475113e629e
font_01_sfnt_off0000d641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD641 10500 bytes
SHA-256: 3bb65cb7cf1f29e5e00bdad180a680dd0635e75e984757f9add15d3717422136
font_02_sfnt_off0000ee44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1