Malicious PDF — malware analysis report

Static analysis result for SHA-256 470762ca677af857…

MALICIOUS

PDF

86.9 KB Created: 2021-09-11 22:21:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 138f0abba39a67c0ce135f32567015b3 SHA-1: 0dfbe7540417856b5b60521a07f9be68f0c55137 SHA-256: 470762ca677af8574cf1d2fae661bddf500ca83e1a83c0beaf61037cdc5b32fe
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, with high confidence. It contains embedded JavaScript, indicating an attempt to execute malicious code upon opening. The PDF also hosts a large number of external links, many on unknown domains, suggesting a link farm or phishing lure designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://jackinthegymtpe.com/uploads/files/202109021525236237.pdf In PDF document text
    • https://eletroluz-al.com/_IMG/img_internas/file/70389532663.pdfIn PDF document text
    • http://pronobile.de/catalog/file/wurutuvobefidasadatuxo.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/totajabexevoduwukali.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/rekojepukemonoredip.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/27247226182.pdfIn PDF document text
    • https://autopsrus.aerovents.com/ckfinder/userfiles/files/34462103979.pdfIn PDF document text
    • http://pappteam.hu/userfiles/file/vogavutofuz.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/76227988746.pdfIn PDF document text
    • http://vrtaspol.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/radonelutagoxitikobu.pdfIn PDF document text
    • http://mutamobilya.com/images_upload/files/99261388482.pdfIn PDF document text
    • http://herborgthailand.com/file_media/file_image/file/dajuzugigutawamujutoxes.pdfIn PDF document text
    • http://daisin1977.com/js/upload/files/9695165276.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/jojimedurekulukev.pdfIn PDF document text
    • http://umbabox.com/userfiles/file/48559892377.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/fusamobupezojame.pdfIn PDF document text
    • https://notarbrazda.cz/userfiles/file/In PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16131af26678b6---toxigotuz.pdfIn PDF document text
    • http://farmandari-sarvestan.ir/images/news/files/dikolisozuxowero.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210910090057350.pdfIn PDF document text
    • https://irastuff.com/admin/ckfinder/uploads/files/tapimoduromijafeb.pdfIn PDF document text
    • http://e3edu.vn/public/ckfinder/core/connector/php/connector.phppublic/uploadsfiles/43107589344.pdfIn PDF document text
    • https://businessincasey.com.au/application/third_party/ckfinder/userfiles/files/bitadapopadew.pdfIn PDF document text
    • https://steammining.com/userfiles/file/54690161948.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+change+flutter+app+package+namePDF 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_off0000eb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB39 18484 bytes
SHA-256: 8d5cabbd2ee3388cc9d03e12984d2923e7f7379bdcedfb7478363dc77bf08a99
font_01_sfnt_off00011c7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7A 10936 bytes
SHA-256: f821636b755cb5176105507be1c52682beca5f5a3cff861cd1b186928ba45605
font_02_sfnt_off000135b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1