Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee22547bdc0c4bb6…

MALICIOUS

PDF

86.5 KB Created: 2021-09-18 19:24:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2f31b843688ea7b604b9fecf353619c7 SHA-1: 1cfc96147e153fd0c2a96617374f55c2ba2c313b SHA-256: ee22547bdc0c4bb6189d7de514b7bb8f1ba9f8eb2c671ba5b6b3c14380a8bf66
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for executing malicious code. The file also includes numerous external URLs, many of which are hosted on compromised websites or disposable domains, suggesting an attempt to redirect users to malicious content or download further payloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://wastran.ru/uplcv?utm_term=satellite+director+app+download PDF link annotation
    • http://www.sname.org.tw/sname/ckfinder/userfiles/files/dubigaketadakuxeruxerumu.pdfIn PDF document text
    • http://pyhunlian.com/uploadfile/file/dopubojatota.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f30399d317---wawutaxozilawo.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/66981267222.pdfIn PDF document text
    • http://www.satunatc.ac.th/ckfinder/userfiles/files/63260218398.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/34919724771858f6ce072fd54f2d68be/baferobejalawazajobek.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131686d203df---71043977835.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16139ce26e9c24---38838999883.pdfIn PDF document text
    • http://toyotaprius-custom.com/js/upload/files/lifirizunuroferekur.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613f55f1d6cd7---13156159344.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/buvidenarakuxonuli.pdfIn PDF document text
    • http://standdominica.org/files/files/pomuzotiparunarevajowilox.pdfIn PDF document text
    • http://rockycheng.com/ckfinder/userfiles/files/58826623651.pdfIn PDF document text
    • https://buzascsaba.hu/userFiles/file/97340899326.pdfIn PDF document text
    • http://cataga.de/beta/files/file/8526976882.pdfIn PDF document text
    • https://piataafacerilor.ro/app/webroot/files/userfiles/files/nilexu.pdfIn PDF document text
    • http://thai-apsproducts.com/file_media/file_image/file/godisobefigaj.pdfIn PDF document text
    • http://www.scsk12.org/policy/files/files/sixazakebigefab.pdfIn PDF document text
    • http://thehedgerowchronicles.com/ckfinder/userfiles/files/jefenumir.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16135af2743351---sipumevo.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/26854314491.pdfIn PDF document text
    • http://droneducational.com/admin/userfiles/file/nafutilemutakazetof.pdfIn PDF document text
    • http://artospace.com/pics/file/74512780755.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/29406987479.pdfIn PDF document text
    • http://shijijiaming.net/filespath/files/20210914042934.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_off0000eb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB83 10500 bytes
SHA-256: fd042e09408144a4108a285adff6bdf8ccb26dd24a590e4d21061c5238dd38ab
font_01_sfnt_off00010385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10385 18808 bytes
SHA-256: 871bb5f2a7249e87268222d9bdaf78d6063a998337106be25dacf2880dcf385b
font_02_sfnt_off0001344c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1344C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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