Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a09d13effa354d…

MALICIOUS

PDF

85.5 KB Created: 2021-09-10 14:03:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cf7e4f334f03ea53e575d87bbdf7aff4 SHA-1: aa96f4d7105ac756f64353736dba2274b21d52f9 SHA-256: e6a09d13effa354d196745e2ea6cd8136404f7c6d87b47bfea7608f3d1861be8
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. Multiple external URLs are present, suggesting the PDF acts as a lure or downloader for further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://chcial.ru/uplcv?utm_term=super+mario+crossover+3.0 PDF link annotation
    • https://postelezmasivu-praha.cz/ckfinder/userfiles/files/gijowofevobabibuvosuvilos.pdfIn PDF document text
    • https://lombardpruszkow.pl/local/userfiles/file/95494047290.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/matufukijofubimaz.pdfIn PDF document text
    • http://hkalc.com/userfiles/43287852439.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16136938be6a7e---jumokojopijipimakedula.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/1f8c70bbd668b99c38fb057c6b252904/bilaniteg.pdfIn PDF document text
    • http://myphamso1.net/uploads/files/zagumikelodizikezetew.pdfIn PDF document text
    • https://cpc-serbia.org/js/files/paxinutajazipezot.pdfIn PDF document text
    • https://mahae.hu/files/files/dokotowuni.pdfIn PDF document text
    • http://rivebistro.net/ckfinder/userfiles/files/dedanalobetefeler.pdfIn PDF document text
    • http://arndt-fahrschule.de/userfiles/file/mavuwopulom.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/tidiguxojegesozexetaka.pdfIn PDF document text
    • https://webmenuplus.com/images/file/30784329787.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/bomesominonewuvixulitas.pdfIn PDF document text
    • http://texinpack.com/uploadfile/file///2021090719220796.pdfIn PDF document text
    • http://weingut-suppan.at/files/bogovisulezikoberenivivat.pdfIn PDF document text
    • http://specimport.by/files/files/gupidegabokul.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/95868915802.pdfIn PDF document text
    • https://guruamardaspublicschool.com/userfiles/files/dafatofetivoxad.pdfIn PDF document text
    • http://vrakskodamnetice.cz/file/lixoxapawoxefu.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/gesokotedeg.pdfIn PDF document text
    • http://hanasushipickup.com/uploads/files/luxobajef.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/82703813987.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_off0000e848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE848 10888 bytes
SHA-256: 7ba8266a6b6189ef17e7ff899204f0cf6e55fc369ce71d280ea22c1f9df4b211
font_01_sfnt_off00010177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10177 17868 bytes
SHA-256: 69dcf0113d64e718a4715af09f46e10894cf7ee43d930c29e1dd1795c47d7a33
font_02_sfnt_off00013000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13000 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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