Malicious PDF — malware analysis report

Static analysis result for SHA-256 273952cdf8977961…

MALICIOUS

PDF

68.0 KB Created: 2021-09-30 19:28:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 14c0ebc7430164e1534df41f46398142 SHA-1: 677a25c81b4886de804ab191366536943a714808 SHA-256: 273952cdf89779614cacb4bce0cba9a4e340def8f2c9866528bd2f4b973472a8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of link farms hosted on compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware-hosting sites. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://crewmak.ru/uplcv?utm_term=new+mortal+kombat+movie+2021
    • http://rainternacional.com/userfiles/file/xexararetemufutu.pdf
    • http://reitinguok.lt/userfiles/file/15107575766.pdf
    • https://albizy.com/ckfinder/userfiles/files/40461868513.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/a8ef9ea5a9189512f4752385c3c194c8/46481224781.pdf
    • http://thuexedanang247.com/uploads/image/files/58046976847.pdf
    • http://dspec-car.com/js/upload/files/gadimu.pdf
    • https://harley.dataroom.tw/upload/files/40399933434.pdf
    • http://www.niziointerior.pl/upload/file/duvalutakuwepusozebawin.pdf
    • https://misbahelmudii.org/ckfinder/userfiles/files/59144488505.pdf
    • http://way-of-spirit.ru/upload/file/dixupovodakot.pdf
    • http://senvietsystem.com/ckeditor/upload/files/fuzekig.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/161443f6252e15---wufabifej.pdf
    • http://nollve.com/img/editor/image/file/70432012198.pdf
    • http://wksx.top/images/userfiles/file/momajolixesupob.pdf
    • http://samuiluxurytravel.com/Uploads/file/neworinukenuxazowide.pdf
    • http://dylogistics.com/userData/board/file/72697658061.pdf
    • http://oldmotorsclub.com/files/file/pezisedunuvadamokoz.pdf
    • http://rfinshaat.az/userfiles/file/25008890940.pdf
    • http://www.rify.us/cms-uploads/files/84909711572.pdf
    • http://svsteinfurth.de/radsportfiles/file/53997712210.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/pv88uoq3jgtavdlv586otff4q5/36119838670.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ab36.bin
9c85a982163fe4ebfe6ea1bab2878fa53f09472b9374bee6e585348edd18a31b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB36 15456 bytes
font_01_sfnt_off0000d287.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD287 16792 bytes
font_02_sfnt_off0000ea9e.bin
9a59e03b45dcc26e6fc1fa48372b02c3f18cc2a886a3de2426c6613f7a2620ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9E 10652 bytes

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