Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bb048e73d49fd81…

MALICIOUS

PDF

71.2 KB Created: 2021-09-26 01:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ee4dd61ff6ba90b63e36dd22050ef0be SHA-1: 071cd85affd1887581bafa90fa906b52252d9c98 SHA-256: 7bb048e73d49fd819cec0170dd43cfd123cd1387e6c4c3396f539e286bb6c49e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely responsible for redirecting users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://wastran.ru/uplcv?utm_term=how+to+hack+touchgrind+skate+2 PDF link annotation
    • http://sayarbobinaj.com/file/58890050095.pdfIn PDF document text
    • https://ip-pharma.net/data/files/47651083155.pdfIn PDF document text
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/46393941764.pdfIn PDF document text
    • http://kurumakaitori-one.com/js/upload/files/molegapofavu.pdfIn PDF document text
    • http://nitecoreromania.ro/files/file/52737510991.pdfIn PDF document text
    • http://resumesfromabove.com/userfiles/file/xajixawaxuxevowaxupozus.pdfIn PDF document text
    • https://listocrm.com/userfiles/files/1381101390.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/buginak.pdfIn PDF document text
    • https://heyratacademy.ir/file/tanabelarudodepe.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b579628bd2---75607417096.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/finekexojinajikigedumibi.pdfIn PDF document text
    • http://wsospice.org/uploads/userfiles/file/file/zuzomaneserudevakatamuneg.pdfIn PDF document text
    • http://tucholainfo.pl/userfiles/file/87934985426.pdfIn PDF document text
    • http://bestpokeya.com/uploads/files/55366422666.pdfIn PDF document text
    • http://ambvetsanprospero.eu/userfiles/files/14265078240.pdfIn PDF document text
    • http://jiachuankeji.com/upload_fck/file/2021-9-14/20210914010940200308.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/54uak32uoul516vvtiudnlsvi6/wubiv.pdfIn PDF document text
    • http://savaksangida.com/resimler/files/pesabiwoziwis.pdfIn PDF document text
    • http://guchen.ru/d/files/47046044459.pdfIn PDF document text
    • http://kompassztuki.pl/Image/files/kamoreforiwisuramafukiw.pdfIn PDF document text
    • http://stavebnevyrobky.sk/www/upload/files/xalovolesasalugi.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/gexuxekupenebutenimetix.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/dasaseg.pdfIn PDF document text
    • https://marathonblainville.com/userfiles/files/66473359964.pdfIn PDF document text
    • https://www.casestilistas.es/ckfinder/userfiles/files/51808521870.pdfIn PDF document text
    • http://esejsc.com/upload/files/zazubefaleborowe.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_off0000b47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB47A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC8C 15456 bytes
SHA-256: c0fa591350e3b89500513b337681f93f10b7e08e5e5847ad25a5082a238dd1b2
font_02_sfnt_off0000f3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A8 10992 bytes
SHA-256: dcbc1720c7d72aaf2ceeb918c14daff7d17d47bb3af521e0677c3535b5012d64