Malicious PDF — malware analysis report

Static analysis result for SHA-256 61df9156702eef1e…

MALICIOUS

PDF

77.7 KB Created: 2021-09-19 02:02:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 23e4ac1a6a6b756d7eba3a7d114838b1 SHA-1: fe7ee8ec993c99f18c56329b9c19134c85db895f SHA-256: 61df9156702eef1edabc150e6d7ed2624f14b581948ce1b85d8a79e971cf779b
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. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects the user to one of the numerous external URLs found in the document, such as 'https://ctcitsupport.com/media/files/dakonepefase.pdf', which is a typical lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://ctcitsupport.com/media/files/dakonepefase.pdf In PDF document text
    • http://getsolarny.com/userfiles/file/juwudimo.pdfIn PDF document text
    • https://osiindia.org/ckfinder/userfiles/files/bunetomareka.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141dd3b07914---55038714725.pdfIn PDF document text
    • http://fireprovietnam.net/luutru/files/84443628071.pdfIn PDF document text
    • https://anitacalderon.com/ckfinder/userfiles/files/12040307507.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/9228232526.pdfIn PDF document text
    • http://happysmilecard.com/uploads/files/18763657887.pdfIn PDF document text
    • http://epwuae.com/userfiles/file/febupewuzukaka.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/41505619215.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///goposekokaronorijino.pdfIn PDF document text
    • http://marupi.de/UserFiles/File/jexilominuzazalew.pdfIn PDF document text
    • http://odessawa.com/userfiles/file/zedivoteginuves.pdfIn PDF document text
    • http://gold-carsales.com/js/upload/files/pixot.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a032d933e4---90945316155.pdfIn PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/rakebenoxomoxibali.pdfIn PDF document text
    • http://nakajima-ya.com/upload/save_image/files/36535884006.pdfIn PDF document text
    • http://sowiik.pl/userfiles/file/sulupofiwepoxilunusu.pdfIn PDF document text
    • http://thinhhoanggia.vn/Images_upload/files/81500997617.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/29660436763.pdfIn PDF document text
    • https://goldgreiner.de/userfiles/file/76113323579.pdfIn PDF document text
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/likomena.pdfIn PDF document text
    • https://marathonlaval.com/userfiles/files/42570695396.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/36853748325.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=login+and+register+android+studio+sqlitePDF 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_off0000ca07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA07 17908 bytes
SHA-256: 532a602e6e96a7391291cb711c8772192292f6143e3e5fb7956c076b0b04ae40
font_01_sfnt_off0000f91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91F 10628 bytes
SHA-256: 7420251440551f0b5067c962810652f8d8ae68afcc9eb0b8a65310e0c6167b6c
font_02_sfnt_off00011108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11108 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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