Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc72235317cc392…

MALICIOUS

PDF

82.0 KB Created: 2021-09-12 18:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f5b40cea018ef8a4217be1d63b7c8c39 SHA-1: ce1c9cc22e492600674a8a06bb3f1cdca05e91f0 SHA-256: fcc72235317cc39245c3601424380c89712a51da5bae78c6f2d2085e30d4b660
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, indicating it's designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to its use in exploiting PDF vulnerabilities or delivering malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://infrive.ru/uplcv?utm_term=top+1+battleground+game PDF link annotation
    • http://agama-rc.com/upload/files/35644669922.pdfIn PDF document text
    • http://safetruck.gr/images/file/zilojixipodov.pdfIn PDF document text
    • http://cosmik-kinoteatr.ru/sadm_files/53127502238.pdfIn PDF document text
    • http://caytrong.vn/Images_upload/files/62212226081.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/jomefazerivaduzubanuf.pdfIn PDF document text
    • http://fratellilongoni.com/userfiles/files/danirapuse.pdfIn PDF document text
    • https://morabia.fi/images/file/5529561061.pdfIn PDF document text
    • http://yuh-tarng.com/userfiles/file/zimupefujepobafune.pdfIn PDF document text
    • http://fgosvo.ru/files/files/sofukibu.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/lazuwisotiwevuza.pdfIn PDF document text
    • http://xn--j1aai7d.xn--p1ai/userfiles/file/wazuberoxirugomonofil.pdfIn PDF document text
    • https://superchills.com/userfiles/file/62667661162.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/gorojeb.pdfIn PDF document text
    • http://vitrine-prof.com/files/nuduvazupodakovukenofufe.pdfIn PDF document text
    • https://xn--interpeas-r6a.es/upload/files/reroxetararo.pdfIn PDF document text
    • http://istihdamhaberleri.com/upload/ckfinder/files/rekufonaxer.pdfIn PDF document text
    • https://renetravel.ro/images/files/73731837056.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/43283927023.pdfIn PDF document text
    • http://carbonelite.ru/file/kafoxixuruzaxuwapivadoz.pdfIn PDF document text
    • http://cabini.it/userfiles/files/70240419504.pdfIn PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/sodugojejitozopife.pdfIn PDF document text
    • https://malmospelmanslag.se/userfiles/file/47684209314.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_off0000de3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3F 10728 bytes
SHA-256: ec942424ec4a74af0dfe4c419a67f10c07d563b7a3aa907e647e40cf35a89460
font_01_sfnt_off0000f67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8C 17000 bytes
SHA-256: 749e4014209d9caf643e77e85360078116ac7a867398789a86dd878e4ba9d491

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