Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e8823ab0a40f41…

MALICIOUS

PDF

73.1 KB Created: 2021-09-16 18:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bc34f2788e5ef45c5afdbd88887a0dac SHA-1: 910ee81099780dd8dd3ae4ea84cbc55c8eb0e332 SHA-256: 29e8823ab0a40f41382ff820913d6cf357371249d4019305725a9322726eac77
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code or redirecting users to malicious sites. The heuristic 'ML_NYX_PDF_MALICIOUS' and ClamAV detection strongly indicate malicious intent. The numerous external URLs, including those with 'utm_term' parameters, suggest a phishing or spam campaign aimed at driving traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://oniceh.ru/uplcv?utm_term=how+to+print+1+page+on+2+sheets PDF link annotation
    • https://htijsr.com/userfiles/file/kuseberabexigitinile.pdfIn PDF document text
    • http://com123.vn/uploads/file/52323775633.pdfIn PDF document text
    • http://boxethai38.com/upload/file/movorivawutusifisif.pdfIn PDF document text
    • http://manhchenang.vn/webroot/img/files/2388513995.pdfIn PDF document text
    • http://www.jasfec.com/imgs/uploads/23824471242.pdfIn PDF document text
    • https://5703n1n6999-6a55.com/contents/files/27790340829.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/72082548596.pdfIn PDF document text
    • http://assotechne.eu/userfiles/files/pukovapakeg.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/memotubevisedepa.pdfIn PDF document text
    • http://impex-italia.it/userfiles/files/tinuboborexupuwuwamoti.pdfIn PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/23012886349.pdfIn PDF document text
    • https://netron.pt/app/webroot/media/files/fesojatukobisufepadutagas.pdfIn PDF document text
    • https://totalsewa.com/userfiles/file/67795914696.pdfIn PDF document text
    • http://ohxto.com/uploaded_files/userfiles/files/44047536052.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/058249bec87b1a2152937abca1f2639e/83902235523.pdfIn PDF document text
    • http://2013.letnifestiwal.pl/ckfinder/userfiles/files/24662707809.pdfIn PDF document text
    • http://finalstage.biz/js/upload/files/22880960072.pdfIn PDF document text
    • http://sakesushilakehavasu.com/uploads/files/31425460062.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/zuzupisotepab.pdfIn PDF document text
    • https://daqing-jewelry.com/uploads/files/202109110348443719.pdfIn PDF document text
    • http://zamdq.com/filespath/files/20210908140717.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/60700517053.pdfIn PDF document text
    • http://veewood.com/file_media/file_image/file/75014484594.pdfIn PDF document text
    • http://gzmingjun.com/uploadfile/files/20210909_083255.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_off0000bd54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD54 10732 bytes
SHA-256: 780a58c41306579c263eea4241a6ae4d3a897ccb253493d6334250c0c59ad126
font_01_sfnt_off0000d617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD617 15704 bytes
SHA-256: e5fcb3729c92378e8599332129a39e5009aa8a9270ba69bf568cfc41c88731eb
font_02_sfnt_off0000fe58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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