Malicious PDF — malware analysis report

Static analysis result for SHA-256 927ae70ddff5b235…

MALICIOUS

PDF

95.6 KB Created: 2021-09-19 13:22:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 86029415eef7be735ea1c21a5c268128 SHA-1: 6066a2e53e51348413660b5799099c6a13db58b8 SHA-256: 927ae70ddff5b235d4939298c928aea0b12995b74b8b5a1bcec93b25a1339220
134 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 a link farm designed to obscure the true destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a phishing lure or download a secondary payload. The presence of embedded JavaScript suggests an attempt to exploit vulnerabilities or redirect the user.

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 http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50771259104.pdf In PDF document text
    • http://dallard.fr/ressource/site-image/files/86831729690.pdfIn PDF document text
    • http://www.jucadent.es/ckfinder/userfiles/files/76755123989.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/16286359408.pdfIn PDF document text
    • https://highendteen.com/userfiles/files/87848476549.pdfIn PDF document text
    • http://bscartridge.com/pic/xasuvoniruduzeroweso.pdfIn PDF document text
    • http://okvin.org/userfiles/file/51646315467.pdfIn PDF document text
    • https://karate2.cdmedia.pl/userfiles/file/gadebi.pdfIn PDF document text
    • http://dylogistics.com/userData/board/file/mokomejo.pdfIn PDF document text
    • http://koreabulk.net/userData/board/file/xumibetodeguzoresodasan.pdfIn PDF document text
    • https://livermore.com/wysiwygfiles/file/92855986048.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-9-6/20210906194614611442.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/nilavuxaxogumurodisuzopag.pdfIn PDF document text
    • http://mackyz7automotive.com/js/upload/files/43454997273.pdfIn PDF document text
    • https://cebrium.ssnn.ro/images/47660602699.pdfIn PDF document text
    • http://pi-consulting.ch/download/lumusesalokovojites.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/fezesesadigimosun.pdfIn PDF document text
    • https://davnosti.ru/upload/97719381224.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/57a9af38da504e15482840ed1579a268/15840773522.pdfIn PDF document text
    • http://aprt1day.ru/file/62578250409.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/bb42379b12b598fb7a8e14d6fd84a0f2/60054838137.pdfIn PDF document text
    • http://morakothotel.com/file_media/file_image/file/kowagegape.pdfIn PDF document text
    • http://holidayservicemarsala.it/userfiles/files/waburof.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16132459e117e8---jesewotu.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/xukeram.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=miessler+inorganic+chemistry+5th+solution+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_off00010ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE2 18512 bytes
SHA-256: 664ff121e613a5509789f9eee4954eab1c2f15a4162b30d861a07c7ca7d777f2
font_01_sfnt_off00013da2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DA2 11408 bytes
SHA-256: 4e2bc2852bd3911e5be11562e8b9862a03a49d7e847e50d9a6d578efe42ea114
font_02_sfnt_off0001583f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1583F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1