Malicious PDF — malware analysis report

Static analysis result for SHA-256 d34a2f90d87bf197…

MALICIOUS

PDF

97.1 KB Created: 2021-09-20 05:05:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e0783b32b06b3e74d327e6d7f43835e1 SHA-1: 2df5b35cb2dd1a075fe76f5d92384780170f54ae SHA-256: d34a2f90d87bf197ca888b6768e53895398c59cf785c3407b7c7818a27ab4558
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier with high confidence. It contains an embedded JavaScript stream and numerous external URIs, many hosted on disposable domains, suggesting a phishing or malware distribution attempt. The presence of a visual download button further supports the lure of a malicious download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://garglob.ru/uplcv?utm_term=the+chi+putlocker PDF link annotation
    • https://birgatour.mn/js/ckfinder/userfiles/files/mejuvapijiwiniz.pdfIn PDF document text
    • https://mtydizayn.com/userfiles/file/jirezafarijejifuxonuwopu.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/62936623196.pdfIn PDF document text
    • https://abzesolar.com/uploads/files/51103901583.pdfIn PDF document text
    • http://protrialse.eu/files/files/811165988.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/93946199423.pdfIn PDF document text
    • http://ets-sptk.ru/pic/file/57116800204.pdfIn PDF document text
    • https://successalpha.team/upload/files/6934641471.pdfIn PDF document text
    • https://webmedcentralplus.com/userfiles/file/77240849094.pdfIn PDF document text
    • https://cairparavel.ro/app/webroot/files/userfiles/files/75121076477.pdfIn PDF document text
    • http://emekyesiltepe.net/images_upload/files/putazagipidukajamofekivu.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/govuzebekewoxes.pdfIn PDF document text
    • http://life-worldwide.org/assets/uploads/files/buwosezosevefafipokumom.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/zukawelamasajosi.pdfIn PDF document text
    • http://hondaototanan.com/upload/files/91404609699.pdfIn PDF document text
    • https://md-bud.pl/szklo/photos/file/99709709537.pdfIn PDF document text
    • http://tbff-bygg.se/img/files/jatubuvuxeberolifigilibat.pdfIn PDF document text
    • http://schturman.ru/files/files/28989568422.pdfIn PDF document text
    • http://xutricolor.com/uploadfile/files/pitamu.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/luzodudikiwe.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614790d909133---18095857991.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/8e06883bc39186de2f5dde4490de5d12/53808728164.pdfIn PDF document text
    • http://studiotecnicomancini.eu/userfiles/files/tatuxu.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_off000114fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FC 10192 bytes
SHA-256: dbb45c46d0c19711df3b362ce4a3467600b5c622f24618fecd15690f07f640a9
font_01_sfnt_off00012bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14407 19524 bytes
SHA-256: fed16dcb78f4f4fbb1a71662839651a21c4d38a9e442489961968d4d0763b8dd