Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba2cb87b4c4e3f7…

MALICIOUS

PDF

93.4 KB Created: 2021-09-09 07:38:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6a9047be77f617c966d4d3e37d387858 SHA-1: eccbc1c88bc33e7f2cb8a4802b859af185ecb38b SHA-256: fba2cb87b4c4e3f735f3f73bc3d5285b70c8f9461709a11f1fcd69d3f75ebfbe
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 URLs, suggesting it is designed to redirect users to malicious sites. The presence of JavaScript points to an attempt to execute code within the PDF viewer, likely to facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://chcial.ru/uplcv?utm_term=proverbs+31+bible+study+pdf PDF link annotation
    • http://garderoba.sk/images/_file/64645525016.pdfIn PDF document text
    • https://topconta.ro/userfiles/file/80467136020.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/kekufexomefipulo.pdfIn PDF document text
    • https://mimpi1pusat.com/contents/files/946008121.pdfIn PDF document text
    • https://madeirashopping.com/userfiles/file/79332062332.pdfIn PDF document text
    • https://intersensor.ro/v2011/Files/fck_upload/file/redob.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/fupowujiloxipuwuzivila.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/53592223242.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/mijiwewadegubu.pdfIn PDF document text
    • https://rumusjitu.com/contents/files/8207003532.pdfIn PDF document text
    • http://hichipper.com/hichipper/uploadfile/file/2021090308075173499.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/89798656064.pdfIn PDF document text
    • http://glassick.com/userfiles/file/litixuzidegijexuxumadadi.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613986da92123---87352692885.pdfIn PDF document text
    • http://carnow.jp/js/upload/files/56063306632.pdfIn PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/bugiguvulajidederupogizu.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/warenuravile.pdfIn PDF document text
    • http://knowleangling.co.uk/ckfinder/userfiles/files/tuferu.pdfIn PDF document text
    • http://back2wood.de/userfiles/file/fepatawalo.pdfIn PDF document text
    • http://huichem.com/ckfinder/userfiles/files/zepufoti.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/61504901660.pdfIn PDF document text
    • http://sinoorchids.com/image/file/vitel.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/90727982511.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/judojeludali.pdfIn PDF document text
    • http://lamay.de/userfiles/file/megabinovote.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_off00010719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10719 18400 bytes
SHA-256: 2a7facf3a67ccbd4928822c6825f16aeee883a09cfcc4adb46d150820724001b
font_01_sfnt_off00013689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13689 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014ea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EA0 10868 bytes
SHA-256: bc20a7058444cb503cbac0264eb599b535a4337414d7ee965e0d98e5d4a9f5e1

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