Malicious PDF — malware analysis report

Static analysis result for SHA-256 facadaa788b8d104…

MALICIOUS

PDF

85.5 KB Created: 2021-09-21 12:37:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 6f374f9d68f0eb9b01b444313f138014 SHA-1: 4883772bca428fbb3d3fc3f8e554b4e3a61ac2a1 SHA-256: facadaa788b8d104590eeda10b9b7c1885685f36b973de31c95a5c8ecf37fd3b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, and it contains embedded JavaScript. This JavaScript is likely responsible for redirecting the user to external URLs, as indicated by the PDF_URI and EMBEDDED_URL heuristics. The numerous external links, many hosted on disposable domains, suggest a link farm or phishing campaign designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=android+secret+codes+2020 PDF link annotation
    • http://kaizenlife.com/ckfinder/userfiles/files/ganasewirilifazibo.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/galuxew.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/nvchpsik979b71g7fc18mop18m/xalakiwolonokisixaguxe.pdfIn PDF document text
    • http://cataga.de/beta/files/file/78119547570.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/b7545ab9fca092184b863b2268fb490b/kififimowofapogi.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/nivogonusiri.pdfIn PDF document text
    • http://silver1979.com/upload/file/48705586428.pdfIn PDF document text
    • http://feuerwehrobrigheim.de/upload/files/80976261524.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/sojezozuzugabodilexe.pdfIn PDF document text
    • https://rjpexport.com/files/1284867935.pdfIn PDF document text
    • http://www.performhabitat.fr/bundles/astadmin/js/ckfinder/userfiles/files/sefapuxiponowimodusiviki.pdfIn PDF document text
    • http://savaksangida.com/resimler/files/ragepudewarufapuj.pdfIn PDF document text
    • https://lmbri.com/WYSIWYGImage/file/xerosulobijobaso.pdfIn PDF document text
    • https://nayyaralidada.net/alpha/ckfinder/userfiles/files/53181574020.pdfIn PDF document text
    • http://kjphotocon.org/data/userfiles/files/gexilikadil.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/56561841478.pdfIn PDF document text
    • http://goodlife88.com/uploads/files/27761772080.pdfIn PDF document text
    • http://baheth24aqari.com/ckfinder/userfiles/files/18028394747.pdfIn PDF document text
    • https://hometutorsdelhi.com/userfiles/files/xomovebom.pdfIn PDF document text
    • http://deauville.ru/files/file/puravojuxapevajadaxav.pdfIn PDF document text
    • https://sportyou.fr/ckfinder/userfiles/files/67665001167.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_off0000e8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001010c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010C 10380 bytes
SHA-256: a56d59306f68a3184f9bfcd839abb5ff0c8b40adc92187b8577d67a2bb5d1c15
font_02_sfnt_off000118b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B3 18220 bytes
SHA-256: 7c6422de13774cc015f6c253ad7eccbcb3f696ae3fb644ca1c2484b406461968

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