Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0a6c7ee24ba03c8…

MALICIOUS

PDF

83.0 KB Created: 2021-09-23 23:07:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7b3eca1266235ab839d8e576ec018ac8 SHA-1: 68532bea8c7603453fd9031735357af92641beda SHA-256: e0a6c7ee24ba03c884f3909c4b96e7a9d3ba870d9ef8798207a76cfa977706e7
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 point to disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://allytemp.ru/uplcv?utm_term=how+to+increase+microphone+volume+on+android PDF link annotation
    • http://xn--krmer-dnnebacke-1kb72b.de/files/file/60101375577.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/40900623412.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/kexavumululuka.pdfIn PDF document text
    • http://pazzo.jp/js/upload/files/zirezigiburawisug.pdfIn PDF document text
    • http://gasthaus-steinkirchen.de/img/editor/file/4032951140.pdfIn PDF document text
    • http://coaching-scolaire.net/userfiles/file/xoxaxosi.pdfIn PDF document text
    • http://kassa.pl/userfiles/file/2276095530.pdfIn PDF document text
    • https://istruttorecinofilo.it/userfiles/file/11786554719.pdfIn PDF document text
    • http://madveras.com/ckfinder/userfiles/files/jixawarigenuxebixufu.pdfIn PDF document text
    • http://wideanglepackaging.com/ckfinder/userfiles/files/wizezubujib.pdfIn PDF document text
    • http://jts-electrical.co.uk/ckfinder/userfiles/files/simerabibojaleromiduludod.pdfIn PDF document text
    • https://callmarkinvestments.com/callmark/files/molidodowitixejunoxel.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/352a73a91fbec405a85fc7a94babc4ce/49389641499.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/kesebarumalijijeremuruj.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/66047886280.pdfIn PDF document text
    • https://dauglita.lt/components/com_mijoshop/opencart/image/data/files/57932780421.pdfIn PDF document text
    • http://afro-safari.com/upload/files/narowenatemafi.pdfIn PDF document text
    • http://pusheng168.com/uploadfiles/20210909134632.pdfIn PDF document text
    • http://nomayaku.com/userfiles/file/71339338465.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16140726f57b40---16010472364.pdfIn PDF document text
    • https://dobre-akce.cz/media/files/file/92637630654.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/buguregup.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-12/20210912142141195008.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_off0000dde3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE3 11024 bytes
SHA-256: d588189baa000e590cbd5fc6731ad6ac274f03333c680fa76e7505636253b529
font_01_sfnt_off0000f74e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74E 18316 bytes
SHA-256: 47716de454b241edc57c1652596a42d84e7184c86dd7e0171da7378c45de0e60
font_02_sfnt_off0001268b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1268B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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