Malicious PDF — malware analysis report

Static analysis result for SHA-256 03351bfcee59038d…

MALICIOUS

PDF

75.2 KB Created: 2021-09-02 02:12:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e50f3400a63733467c9b62c4ea4d967b SHA-1: 168a6d3710d07360c27b3034494b9b6aa7fe55fd SHA-256: 03351bfcee59038db488938b756b31068f0a721f867a71f7f8f28dd4df891fdd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to numerous compromised websites, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to malicious content or further compromise. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://dichvugiayphep.biz/upload/ck/files/46001483617.pdf In PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/jvkrnm5p9u3ds1k59vrqel3f3j/95358351150.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dde3407c133---59746838935.pdfIn PDF document text
    • https://khonggiansachhanoi.vn/uploads/files/ganawowin.pdfIn PDF document text
    • https://airbays.com/userfiles/file/dasiviboga.pdfIn PDF document text
    • https://carsen.sk/editor_uploads/system/files/wuvefogewu.pdfIn PDF document text
    • http://xahscw.com/userfiles/file/vegovatimuvarazuxupu.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/94b4e75e977a61305c78164d0fe97e68/49981640868.pdfIn PDF document text
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/befitunuvivo.pdfIn PDF document text
    • http://motivationandmomentum.net/ci/userfiles/files/sawibenevapumawirakavixo.pdfIn PDF document text
    • https://faprosid.com/file/nufodupupe.pdfIn PDF document text
    • http://cmtsport.com/pliki/jajuwusabozuxoz.pdfIn PDF document text
    • http://runbo.net/upfiles/files/1624967623853.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612e035dd6de8---39090053582.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/95b3ad3bcac331547b89acc7bf04ca11/xowiritobavedovuf.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/47a9c0ba8dce2de6bbd72b46a1a971a6/2165612815.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612cc346e3ace---19520821859.pdfIn PDF document text
    • https://vv-alc.nl/uploads/files/75196698090.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b794b16f9d8---68279452552.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/ep6qtvd11qgqo01jdnif3lj5l5/55301507555.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a92d202c27e---biterawenadix.pdfIn PDF document text
    • https://warsztatgdynia.pl/app/webroot/media/files/koragaputobokiko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=si+unit+of+resistivity+of+a+semiconductorPDF link annotation
    • 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_off0000c0ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0CE 17340 bytes
SHA-256: fe97cb2f6481e106899de6c676c9e42208bf947a6e96f59306f647132e6d82b2
font_01_sfnt_off0000ed7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7C 10948 bytes
SHA-256: daed5175645473166854e7ee62252a208eeb6fe3294218f418c2d63dc21d89d9
font_02_sfnt_off000106ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.