Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d5bea4de92685b…

MALICIOUS

PDF

69.9 KB Created: 2021-09-30 23:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 18d4df134e241c6ba9f57d6504d921b2 SHA-1: 7ac52ada90b9dfec0171321a613368956db7e881 SHA-256: e4d5bea4de92685b417f7d40bcdfa6eb104b713dd96f9e38256e857f9eacf715
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to potentially malicious or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests an attempt to execute malicious code within the user's browser or PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://ecohost.ru/pics/images/file/87152401722.pdf In PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/kowosazimepo.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/23288645357.pdfIn PDF document text
    • https://konferencii.ru/js/ckfinder/userfiles/files/12619663205.pdfIn PDF document text
    • http://phuongdonggolf.vn/app/webroot/uploads/files/sipotezeganinadoxemewowaj.pdfIn PDF document text
    • http://packamate.com/userfiles/18387503711.pdfIn PDF document text
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/zexiwiwaxugaximod.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/99169013394.pdfIn PDF document text
    • http://ticketsperiodico.com/galeria/files/22707509838.pdfIn PDF document text
    • http://yejida.com/userfiles/file/97233359733.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/ludidefisero.pdfIn PDF document text
    • http://aotem.com/data/home/qxu1780220113/htdocs/uploadfile/files/27506958667.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/12647196868.pdfIn PDF document text
    • http://dreamscar.eu/userfiles/file/pefamapedatezitesupur.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/miwefuri.pdfIn PDF document text
    • http://xetaihyundai.net/upload/files/kuxigas.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/59902685610.pdfIn PDF document text
    • http://mrcookie.tw/upload/editor/file/26044823857.pdfIn PDF document text
    • http://kanomax-nsk.ru/images/pixurojivufimutugajinase.pdfIn PDF document text
    • https://0286869143.com/editor_images/files/megelelubevu.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/41829570470.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-9-27/20210927054454758164.pdfIn PDF document text
    • http://veterinariacomportamentale.it/userfiles/files/42794841553.pdfIn PDF document text
    • http://ajeah-intl.org/fck_image/file/zoxurafopevanifafem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+enable+vpn+in+uc+browser+androidPDF 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_off0000b1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1F1 15092 bytes
SHA-256: d9ff1a4f925bc132b2b980fcd6c6f13b06e589cccf492a6665ae81f518c893d1
font_01_sfnt_off0000d85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85A 10888 bytes
SHA-256: 060d22cd1556c7fc82a8ae6024511e72637c68c64346aa8dd7b864fbb37e7653
font_02_sfnt_off0000f172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF172 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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