Malicious PDF — malware analysis report

Static analysis result for SHA-256 22364dd6f991985d…

MALICIOUS

PDF

76.3 KB Created: 2021-09-11 16:50:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ea9929bee03b7e4517af7fcc84beb761 SHA-1: 751f702884e123618a781b68a94f3132fa6e0064 SHA-256: 22364dd6f991985dacaa0bf01ed948c72d348cecdf6eecbd54b998c850a7c3bf
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 disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to malicious sites, contributing to a phishing or malware distribution attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://sakurahoaanhdao.com/webroot/img/files/kixevugu.pdf In PDF document text
    • http://casaledellasignora.it/userfiles/files/xatubolasovopozujok.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/9320085533.pdfIn PDF document text
    • http://www.dgtrans.co.th/login/ckfinder/userfiles/files/75454404292.pdfIn PDF document text
    • http://audyt.rowerowaszkola.pl/imgturysta/files/48055668210.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/fujurinuxofipezaroxut.pdfIn PDF document text
    • https://calienglish.com/ckfinder/images_store/files/sasimemowipozitun.pdfIn PDF document text
    • http://adimhukuk.com/resimler/files/rovuzobavex.pdfIn PDF document text
    • http://konferencii.org/js/ckfinder/userfiles/files/kowugajetaso.pdfIn PDF document text
    • http://mcenterdk.ru/fck_editor_files/files/49509895012.pdfIn PDF document text
    • http://aptekadc.pl/userfiles/userfile/93212440085.pdfIn PDF document text
    • http://edisonprivateschoolbeta.com/cote_dor_import/admin/ckfinder/userfiles/files/40003776069.pdfIn PDF document text
    • https://agape4u.org/userfiles/file/24320926144.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/50798214062.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/82902882492.pdfIn PDF document text
    • http://mannadey.in/FCKeditor/file/pudaditolumeromofogixavur.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/89053803298.pdfIn PDF document text
    • https://petala.gr/userfiles/file/96437124788.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///bitezalixuwodipamugumoma.pdfIn PDF document text
    • https://doitoutdoorz.com/file/1p5GLIycgDy3KSYK.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf1d38d4a7---tegajoveperibubeka.pdfIn PDF document text
    • https://everestart.com/images/stories/file/muzasibumakugodisorega.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=street+fighter+apk+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_off0000c82e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82E 16712 bytes
SHA-256: 45780aea41ad02f089dc60ef3c8a7de07a6ce1c57998c2ce164d95d5d8d5ed65
font_01_sfnt_off0000f33f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33F 10732 bytes
SHA-256: 9f63c55fe27c02165113caeb8572b2517a00f40b15e7f562835ee9da228f96ac
font_02_sfnt_off00010ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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