Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f00a935c77288b…

MALICIOUS

PDF

75.5 KB Created: 2021-09-15 09:20:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: b958b394052bfc8a08e4dc2ae86ee401 SHA-1: a429c325dcdc05081b32c4f7b55c8e49a0a05db6 SHA-256: c6f00a935c77288b51bcf6ac6e12a1df0518c4a5ec20f67ada277ee8f576f088
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 documents. This script is likely responsible for redirecting the user to external URLs, such as the identified `https://pixomot.ru/uplcv?utm_term=the+incredibles+putlocker`, which is indicative of a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://pixomot.ru/uplcv?utm_term=the+incredibles+putlocker PDF link annotation
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6001a9160---tutuzeruxaru.pdfIn PDF document text
    • http://moto-bike.pl/userfiles/file/74747433916.pdfIn PDF document text
    • http://alconsprom.ru/ckfinder/userfiles/files/kilarisuxale.pdfIn PDF document text
    • http://stlukesfp.org/ckfinder/userfiles/files/13984727519.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/nevukifinelutefas.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/kafuzamajosajizowuboj.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea34fd1368---26751506011.pdfIn PDF document text
    • http://beccaro.it/userfiles/files/41465345544.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/7949735384.pdfIn PDF document text
    • https://condicionamentofisico.com/arquivos/file/79499239216.pdfIn PDF document text
    • http://harmonie-avion.fr/actualite/files/jirawinanogarupapowevonif.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161409f05ac909---fudal.pdfIn PDF document text
    • http://sure2trips.com/bot/ckfinder/uf/files/95250421967.pdfIn PDF document text
    • https://octvads.site/js/ckfinder/userfiles/files/33435113922.pdfIn PDF document text
    • https://jajugroup.com/ckfinder/userfiles/files/97232170429.pdfIn PDF document text
    • https://kemxoi.vn/app/webroot/files/images/pages/files/ligosafedelisamefolixaj.pdfIn PDF document text
    • https://sportsslife.net/upload/ckfinder/files/81338001452.pdfIn PDF document text
    • http://4chan.ro/UserFiles/file/nomatenewopubipopam.pdfIn PDF document text
    • http://www.mariabeckmann.com/fotos/uploads/files/15658003527.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/dajakaxukukopepexib.pdfIn PDF document text
    • http://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/bimugebo.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/zitew.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/vikevitewegepi.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_off0000c56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC56C 10744 bytes
SHA-256: d9fb9d4358813676cbe6390b990fd045d5bffb92357c2303ca073c91bacb8cf9
font_01_sfnt_off0000ddd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f5e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E4 16616 bytes
SHA-256: 2113cf4c41a13f868c7f5e2b672a47607862d1a32b5f91bcb73fbbd39e7f0883