Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a23df731bdf5e76…

MALICIOUS

PDF

90.7 KB Created: 2021-09-23 17:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b2a0dac5276ed6850db921ba33c2eb0d SHA-1: 2ae82b4c13addcd5152e9762ffa5b743fd77d3da SHA-256: 2a23df731bdf5e7627107b619dfed57be53d10228b882836306289ad48cd8f91
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or delivering malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a large number of links to potentially malicious or disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pizzeriagiganti.ro/imagini_ws/17823363518.pdf In PDF document text
    • http://maximaviajes.com/FCKfiles/file/valozofako.pdfIn PDF document text
    • http://0225674989.kad.tw/kads/ckfinder/userfiles/files/16643346060.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/14737476403.pdfIn PDF document text
    • http://ph-easycome.com/userfiles/file/2718428280.pdfIn PDF document text
    • https://kar360.com/resimler/files/88745325179.pdfIn PDF document text
    • http://lineshare.net/upload/files/20210914082440.pdfIn PDF document text
    • https://unibel.pl/pliki/upload/file/moziwizajiw.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1614ae849f2c21---mular.pdfIn PDF document text
    • https://mai-avto.ru/upload_files/file/gazagogumapikomifefural.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/4377197672.pdfIn PDF document text
    • http://agecarekorea.com/ckupload/files/23819133165.pdfIn PDF document text
    • http://yourhandmadeitems.com/userfiles/file/kegixigogopalufeni.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139218027f3e---63631517763.pdfIn PDF document text
    • http://benevolo.it/userfiles/files/2741224974.pdfIn PDF document text
    • https://inprovitcolombia.com/ckfinder/userfiles/files/96864996111.pdfIn PDF document text
    • https://interference.ajoda.eu/userfiles/files/mikipejorikawagasakazof.pdfIn PDF document text
    • http://sinoscaform.com/upload/ckimg/files/202109160521176938.pdfIn PDF document text
    • http://dejede.com/userfiles/file/sibabanejavi.pdfIn PDF document text
    • http://dga.gr/ILC/img/file/78088226847.pdfIn PDF document text
    • http://xn----8sbfeahwarn6ac1adp3fb2p.xn--p1ai/userfiles/file/donaposuwak.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/9993663664.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=windows+7+64+32+bit+isoPDF link annotation
    • https://grupo.iberia.com/js/ckfinder/userfiles/files/60369219529.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_off0000d864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD864 21552 bytes
SHA-256: 217cdc982ac3074c464c2cd47971200c1f7b879d29f42ffc87bc297b74446a18
font_01_sfnt_off00010e59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001266b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1266B 20788 bytes
SHA-256: d9517510bce6636b51051cc34518b72c127d63896e633d6fe16069e25698ef7c

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