Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae989b54498f134…

MALICIOUS

PDF

78.9 KB Created: 2021-09-12 07:31:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: aec92a57b7b8a66d32d336ac1b954646 SHA-1: 73c2954d1200ace6a2f60d13570f764f5cd933bf SHA-256: 6ae989b54498f13495edecf570525d9d88251035dd1a4acd909849804bd91685
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which are hosted on disposable domains, indicating a link farm designed to distribute malware. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading further malicious content. The presence of embedded JavaScript points to T1059.007, and the likely delivery method via email makes T1566.001 relevant.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://ecoquimica.cl/dinamicos/uploads/file/sezudefulodenizotutes.pdf In PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/butasuj.pdfIn PDF document text
    • https://infrapanel-alegjobbfutes.hu/userfiles/file/13509110229.pdfIn PDF document text
    • https://scalping.ir/data/files/file/lifixuvovutokukofivafexo.pdfIn PDF document text
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/jibajuroriruni.pdfIn PDF document text
    • https://holocaustresearch.pl/nowy/photo/file/28070178561.pdfIn PDF document text
    • http://thebookmarkcafe.com/uploads/files/40247265145.pdfIn PDF document text
    • http://jump360.co/upload/files/20210901211838.pdfIn PDF document text
    • http://galaxyjewel.cn/uploadfile/files/jogekaloreliralox.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/43278632635.pdfIn PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210906_02E0DC01FC6236F7.pdfIn PDF document text
    • https://ms2oke.com/contents/files/fakekiget.pdfIn PDF document text
    • http://blccy.com/userfiles/files/lidolivebomuserarijufozox.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/fapepotijobawafuroxo.pdfIn PDF document text
    • https://bodymart.in/ckfinder/userfiles/files/ximokesikerad.pdfIn PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/22079134635.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/161339fa49304e---25733247249.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/51606852304.pdfIn PDF document text
    • http://www.synagoge-stommeln.de/ckfinder/userfiles/files/70171170711.pdfIn PDF document text
    • http://budapesticukraszdak.hu/userfiles/files/xogarimusiwefuriz.pdfIn PDF document text
    • http://briztravel.com/upload/files/jowogurokobagake.pdfIn PDF document text
    • http://iscelenie.info/files/file/luxelitigamawezikaniraraj.pdfIn PDF document text
    • http://novelinternationalschool.com/ckfinder/userfiles/files/monubemoralu.pdfIn PDF document text
    • http://ticketsperiodico.com/galeria/files/fodorugekatumidajalobisad.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/67420f7ae91da107227b79aafe12f596/75593030593.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=shaadi+mein+zaroor+aana+2017+480p+download+filmywapPDF 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_off0000c6f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F5 11464 bytes
SHA-256: f647fc0b45982423911bf18cfa11e0c523909a000453698dfdc26bce778c9ee4
font_01_sfnt_off0000e212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE212 19344 bytes
SHA-256: b90ae2e031f2b30a72a7c39ff6c5f474d85e6e5cd65a5b84a45142f4468dc24a
font_02_sfnt_off000113e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1