Malicious PDF — malware analysis report

Static analysis result for SHA-256 661969a29376e453…

MALICIOUS

PDF

79.5 KB Created: 2021-09-13 04:58:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7b24d9cc918b98dc56785190dbe11709 SHA-1: 1a4d467a4ed41ba4e3bdb8e17dd4a8adda6dd279 SHA-256: 661969a29376e45386e0f8d1233627c6672b3b8beda0dd3ef7a4e96ec7b497e0
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 domains and are structured as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or redirecting users to malicious content. The presence of embedded JavaScript suggests an attempt to execute code within the user's browser or PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://bhartiyambeohari.in/userfiles/file/90542296880.pdf In PDF document text
    • http://retailpark.bg/uploads/wysiwyg/files/10123181874.pdfIn PDF document text
    • http://wamaeassociates.com/images/uploads/originals/file/39843767172.pdfIn PDF document text
    • http://speed-r.com/js/upload/files/93990573349.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/fiwomasutubabajepojevagun.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/nupumuzobizogijife.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/rokizigijinutojaxifajef.pdfIn PDF document text
    • https://suativisamsungtaihanoi.net/upload/files/noxewakevisumugur.pdfIn PDF document text
    • http://machin.kr/userData/board/file/79217142925.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/18300374064.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/3516796328.pdfIn PDF document text
    • http://bentleyplemtech.ru/userfiles/file/jonibedifezuzejorobuneran.pdfIn PDF document text
    • http://imobiliariaimperio.com/files/files/28701573512.pdfIn PDF document text
    • https://digireg.dk/upload/97936152210.pdfIn PDF document text
    • https://tsolisp.com/files/file/65986271080.pdfIn PDF document text
    • https://exlite.it/ckfinder/userfiles/files/supebinojobejadoxamaz.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16139a1aea7cd3---pakisumodutikiferasesatud.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/17458804039.pdfIn PDF document text
    • http://smolninskayahotel.com/userfiles/file/xewamogimudogi.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/55260948611.pdfIn PDF document text
    • http://canavesiobruno-architetti.it/userfiles/files/bojoguxaxufu.pdfIn PDF document text
    • https://uzmanwebci.com/calisma2/files/uploads/vegewikatukonisegumuweviz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=hard+target+2+watch+online+freePDF 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_off0000d25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25D 10784 bytes
SHA-256: 68666957b0bb27c649e161d85137fd8bae655c4521b2b5aac8d1882c2137f545
font_01_sfnt_off0000eaf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF3 17752 bytes
SHA-256: 651e3c86b6cb892f008845751d7809ad81fd1a117534a8e5c91babf40f9e7743
font_02_sfnt_off000118bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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