Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0d6c50f6a1084f…

MALICIOUS

PDF

79.8 KB Created: 2021-09-13 15:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4034cd5cd3c75d3d8bb2dac94b743040 SHA-1: eb69dbc6c3d2da473d638db1d5e4aa6cd660e73e SHA-256: cc0d6c50f6a1084fa2792e9abd9eb6b207f8e29147b6fc379ccda544d01729cb
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting vulnerabilities or redirecting users. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the numerous extracted URLs suggest an attempt to direct users to potentially malicious or phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://www.syrahresources.com.au/application/third_party/ckfinder/userfiles/files/fotomozafikuzanumutasabi.pdf In PDF document text
    • http://solemarservizi.it/userfiles/files/58278729282.pdfIn PDF document text
    • https://amigo-shop.105h.net/upload/files/sogawaxav.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/konivat.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9c45ab76d---31721967700.pdfIn PDF document text
    • https://rainbowprinter.com/app/webroot/files/file/66839786488.pdfIn PDF document text
    • http://mengnuanua.com/app/webroot/files/files/26688777928.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/vesavozele.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/jirazipizawu.pdfIn PDF document text
    • http://mis.nrru.ac.th/gradjournal/ckfinder/userfiles/files/27398433939.pdfIn PDF document text
    • http://hypotekaprezamestnancov.sk/res/file/24921532457.pdfIn PDF document text
    • http://www.palmettoexpresslanes.com/system/js/back/ckfinder/userfiles/files/veboruwisomawafefel.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613105c241b42---96218441803.pdfIn PDF document text
    • http://xn--krmer-dnnebacke-1kb72b.de/files/file/91220025574.pdfIn PDF document text
    • http://language-coach.pl/uploads/files/kemikelokobotaz.pdfIn PDF document text
    • https://daotaolaixesontay.com/uploads/file/93103048018.pdfIn PDF document text
    • http://www.extramas.com/userfiles/files/babolipujinowigumune.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/50802952002.pdfIn PDF document text
    • http://aitrans.org/UploadFile/file/F1202109031426192440.pdfIn PDF document text
    • http://jolanyee.com/upload/files/202109112025135733.pdfIn PDF document text
    • http://immobilieninvestors.com/userfiles/file/92325487476.pdfIn PDF document text
    • https://kentacademymiango.com/userfiles/file/kolaj.pdfIn PDF document text
    • https://maria-galland.ru/files/file/wajuwosowifuke.pdfIn PDF document text
    • http://odessawa.com/userfiles/file/10858177551.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/mopirol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=flutter+print+pdfPDF 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_off0000d7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBA 17036 bytes
SHA-256: 705bebc4c6c5f1a43acf632f3d165e6b55dcee97f710f9b9570790d5b15da1eb
font_02_sfnt_off00011b2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2A 10116 bytes
SHA-256: 7a7daba3577648e80d94c0b51232d026d57308761e8524f3733bc4cf3bb16781