Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e9adbe5c9ad177c…

MALICIOUS

PDF

80.9 KB Created: 2021-09-18 13:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9544fd68760d9a49a0de7105d3748d43 SHA-1: bd9971c44389983946ada479795f77e0e58daf0b SHA-256: 1e9adbe5c9ad177cb6e401103eb1aeca6354172e505bd53e38cac502c5f4c9d8
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farm heuristics, indicating its primary purpose is to redirect users to potentially malicious websites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, limiting the analysis of specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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.
  • 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=karma+suture+movie
    • http://xn--42-jlclgg6a3e.xn--p1ai/userfiles/file/xifonemeror.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/15c85fb04915756e773a73a86e00bdff/98112642455.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/cdb1086ffd9bd7eea3b29e57106b1562/97239057613.pdf
    • https://mttrasportisrl.it/dati/upload/file/69672434083.pdf
    • http://papierplus.pl/userfiles/file/43855379166.pdf
    • http://sarica.com.tr/ckfinder/userfiles/files/36613103753.pdf
    • https://jamisonfurnace.ca/userfiles/files/29237809178.pdf
    • https://kentacademymiango.com/userfiles/file/60952869723.pdf
    • http://abwpetersburg.com/uploads/files/vupokun.pdf
    • http://eprdel.cz/userfiles/file/vikunudafu.pdf
    • https://etonbio.com/newsLetters/images/file/22010865801.pdf
    • http://autosoftware.company/autoresponders_images/files/nadatizedajisuvoliwapo.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/4aa0e0e5d310567539d04eb83ba1458b/47892878440.pdf
    • http://centrlita.ru/archive/image/file/48881589819.pdf
    • https://manhalhealing.com/userfiles/file/kegotagekonevuwafusuvil.pdf
    • http://hansungid.com/userfiles/file/77569747727.pdf
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/4e0f2c1bb5efaa098f35aecaca3cfe8d/kuselujod.pdf
    • https://woft-dining.com/webroot/editor-uploads/files/97222606630.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/161434e4d21c18---26843946869.pdf
    • https://wwa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/voketurile.pdf
    • http://networkinglikepro.com/ckfinder/userfiles/files/7025412393.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614141bc15a34---40002741465.pdf
    • https://rubfila.in/files/file/70568397361.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613619d212e2a---goxalizuraxitil.pdf
    • http://ssanadia.in/userfiles/file/67318486282.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d526.bin
1d1754287306203b46cc0a0a49f9c5ed9f0d45ee3b7f9322d4cdb097e8e19189
pdf-font-stream PDF embedded font (sfnt) at offset 0xD526 18784 bytes
font_01_sfnt_off000105b0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x105B0 16792 bytes
font_02_sfnt_off00011dc7.bin
9c56bd82fca596d74162712b0dcb681d51242a5ea3778cf0d977709a8c21b6b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC7 10276 bytes