Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed5549b8f4a2629…

MALICIOUS

PDF

81.7 KB Created: 2021-09-09 15:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7ce41e425860bb9db9ef75c55c9b0faa SHA-1: e4d0c6728860c33063c63e8ac29925735f7b9e0e SHA-256: 6ed5549b8f4a26291a671d441d1b87c3a3d97e959ba954535519c80397bf0c46
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external links, some pointing to compromised CMS uploads, suggesting it's designed to lure users into downloading further malicious content or to exploit vulnerabilities. The presence of JavaScript points to T1059.007, and the overall nature of the file suggests it's delivered as an attachment (T1566.001) and likely exploits client execution (T1203).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cructi.ru/uplcv?utm_term=call+log+recovery+app PDF link annotation
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed7ad25890---57460478266.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50130640004.pdfIn PDF document text
    • http://lonerangerfanclub.com/ckfinder/userfiles/files/komigamu.pdfIn PDF document text
    • https://hargagila.com/uploads/image/files/53348016809.pdfIn PDF document text
    • http://georgewongdesign.com/gwd/upload/files/11918453370.pdfIn PDF document text
    • http://abwbaltimore.com/uploads/files/jatigerolugukusesaz.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/nesolanolurebimemujolo.pdfIn PDF document text
    • https://csn-alliance.com/data/files/45989038206.pdfIn PDF document text
    • https://stpm-sa.com/userfiles/file/zikafokowetalalabunori.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/8212ad7c2fb0cb62079a88296dad6cf7/81824625736.pdfIn PDF document text
    • https://www.la-providence-ehpad.fr/ckfinder/userfiles/files/diwevemadikejevobi.pdfIn PDF document text
    • http://ingore.cn/upload/files/mepavadide.pdfIn PDF document text
    • http://huspanda.com/data/ckfinder/files/lizosetis.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/xotirixuro.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/20858854206139306548d76.pdfIn PDF document text
    • https://zenithservicos.com/userfiles/files/42458348156.pdfIn PDF document text
    • http://pp-aqua.com/userfiles/files/refajotugowozum.pdfIn PDF document text
    • https://cobrawire.com/userfiles/files/limoxufutowerixumamuvuvu.pdfIn PDF document text
    • http://pressvaluation.net/FCKeditor/editor/filemanager/connectors/userfiles/file/reveferabasanakulu.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/hgfbh7sijhbr0usjel6m98p6kc/vakokajir.pdfIn PDF document text
    • https://nedimgame.net/calisma2/files/uploads/donizedutuzag.pdfIn PDF document text
    • http://clinical-pain.com/pds/userfiles/files/kuxozefa.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/nawisofanujakugalonudoz.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_off0000dc23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC23 17812 bytes
SHA-256: 7142b61fb31ba83e29537d58964bf075eaf075cd045c64dfb1a04e65f483325d
font_01_sfnt_off00010a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2E 10296 bytes
SHA-256: 1d0902511f1bbdf669cbbcfdd921b155a90d8ca84d7e2c8f9d2247cc623ac3f4
font_02_sfnt_off00012191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12191 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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