Malicious PDF — malware analysis report

Static analysis result for SHA-256 0293f6508124ae6c…

MALICIOUS

PDF

83.2 KB Created: 2021-09-12 02:08:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7fdbc583a604d9ceeae840d429680740 SHA-1: 130d609b18d704a38ef09d22ef87f20d6c52601d SHA-256: 0293f6508124ae6c56c12fed489126194c2a47051182b0f79a6a6040622434f3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic specifically points to the document's structure, which contains a high number of links pointing to potentially disposable domains. This suggests the primary goal is to direct users to external, likely malicious, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 5

  • 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.
  • 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://tydafa.com/dafa/uploadfiles/20210902134449.pdf In PDF document text
    • http://ecohort.com/userfiles/files/gutivubofamoxasuw.pdfIn PDF document text
    • https://trvstore.com/userfiles/file/sebepo.pdfIn PDF document text
    • https://infrapanel-alegjobbfutes.hu/userfiles/file/77082348712.pdfIn PDF document text
    • http://elverum-revmatiker.no/images/file/volubimed.pdfIn PDF document text
    • http://tienphat.vn/imagesflashupload/file/wepepuge.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/5558917849.pdfIn PDF document text
    • http://mamtaniketan.com/userfiles/file/4079849950.pdfIn PDF document text
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/semirojukapefomudu.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202109060610213878.pdfIn PDF document text
    • http://soldearenales.com/galeria/files/laxanivuz.pdfIn PDF document text
    • https://lmcmanager.com/ckfinder/userfiles/files/fuvavulepojizijotexuwi.pdfIn PDF document text
    • http://tg-focus.ru/userfiles/files/58934758954.pdfIn PDF document text
    • https://akgoz.zemta.com/uploads/files/95522507918.pdfIn PDF document text
    • http://ateliergermain.club/sites/default/files/file/80767120356.pdfIn PDF document text
    • http://debeleven.net/UserFiles/File/77534229941.pdfIn PDF document text
    • http://xn--80aaaghhaztbcd1agjgbccsgfftf.xn--p1ai/pict/file/54120927953.pdfIn PDF document text
    • http://elfast.ru/userfiles/file/romadiketikuju.pdfIn PDF document text
    • http://bogaarchitetti.it/userfiles/files/bolijudiwerok.pdfIn PDF document text
    • http://1night2day.com/ckupload/files/namiwanewobunuriper.pdfIn PDF document text
    • https://doxity.ro/ckfinder/userfiles/files/15007233551.pdfIn PDF document text
    • http://musicfriend.vn/public/default/ckeditor/files/53945190513.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613439a91bdbd---55838880353.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/11947299876.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1613237ee4e074---44553950150.pdfIn PDF document text
    • http://haithuanphat.com/uploads/files/penaxifolozax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=she%27s+dating+the+gangster+writerPDF 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_off0000df62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF779 10556 bytes
SHA-256: f74de326d524b735d2c3328aaa34187631dd21f75bfee49807ec457af3635a46
font_02_sfnt_off00010f68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F68 18012 bytes
SHA-256: f92620c2c63247b9204647a97945346db49b0db69ceb496943585da18b254787