Malicious PDF — malware analysis report

Static analysis result for SHA-256 87ffe73163a9536d…

MALICIOUS

PDF

69.5 KB Created: 2021-10-02 23:50:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 229bc02c87d7275607c829128f368633 SHA-1: b99caf09b25639a8dfe50d029717994c032ab482 SHA-256: 87ffe73163a9536d93c4bc88a5f9405f08bd8303e410257b88e865c21ab8353d
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 PDF documents. The presence of numerous URLs, including one flagged as a link farm, suggests an attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://grandfiltr.com/files/file/nebek.pdf In PDF document text
    • http://ceraunavoltapizzeria.it/userfiles/files/lotujugonivisolasix.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/pknb1strlcfu974qakkiqev840/80877676084.pdfIn PDF document text
    • http://dyneco.kr/userData/board/file/99884002275.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/51922013410.pdfIn PDF document text
    • http://7878.ir/uploader/file/zofurosizimit.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/sttr61sdena4fmrs7n0n5uuakm/52246864073.pdfIn PDF document text
    • https://tradingphrases.net/userfiles/files/88970429690.pdfIn PDF document text
    • https://zoomkish.com/basefile/zoomkishcom/files/zovipapul.pdfIn PDF document text
    • https://agro-zavod.ru/app/webroot/js/ckfinder/userfiles/files/87912088289.pdfIn PDF document text
    • https://saglamahsapkutu.com/img/editor/image/file/taxaxosawebodadejemuxuput.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/juvulukarukexaseranozude.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/54793952051.pdfIn PDF document text
    • https://stepweystudy.com/ckfinder/userfiles/files/72132512981.pdfIn PDF document text
    • http://machinegroup.ru/img/outer/files/lipemomudijenubiv.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/bapipedosurob.pdfIn PDF document text
    • http://hanlacsclub.com/ckupload/files/sukevetafawuroliwu.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/vebutu.pdfIn PDF document text
    • http://www.luna1956.com/images/library/File/99193503782.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/47786305527.pdfIn PDF document text
    • http://aasghsflqsae.handylover.com/upload/files/73800015256.pdfIn PDF document text
    • http://kruengrangthai.com/files/files/bowawomaruzatefoxuzu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=free+download+software+to+convert+pdf+to+word+full+versionPDF 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_off0000ae4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE4F 10840 bytes
SHA-256: e254ae0e2fc0f074a361efc195b934bdbad7ed6f64023e72df0cafe59a222ace
font_01_sfnt_off0000c781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC781 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000df93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF93 16172 bytes
SHA-256: 4c9347a931d16cfdfae806a7b9841065cf7afff5e4cd05f84aa38514f7f47779

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