Malicious PDF — malware analysis report

Static analysis result for SHA-256 cafcf089499ee959…

MALICIOUS

PDF

83.7 KB Created: 2021-09-17 00:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 494e7420c4cc56b0c0fdf185be7892dc SHA-1: e8929240d1eae0a34a68558ee7b3aaf98e4da7df SHA-256: cafcf089499ee959ac8d96a00079a091e4b2de94d04c3c2aabdebaebfc7fce4c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection as a phishing trojan. It contains a large number of embedded links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of phishing or malware distribution attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://svltv.in/userfiles/files/61286836262.pdf
    • http://apvn.info/userfiles/file/maxekelelonuxom.pdf
    • http://swiftnb.com/ckfinder/userfiles/files/sudinenez.pdf
    • http://german-ex.com/images/blog/file/kemawarar.pdf
    • https://gsm.company/ckfinder/userfiles/files/duxugenoguxowululojoriled.pdf
    • http://tostonet.cl/ckfinder/userfiles/files/faxowapuwuxaxagedovibij.pdf
    • https://lescourailleurs.com/upload/editor/file/59819779809.pdf
    • https://cambodiadriverservice.com/userfiles/file/vufutizitiloruka.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130db3a65193---xuzelufejatuka.pdf
    • https://immsac.pe/sgi_userfiles/userfiles/files/76337524660.pdf
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/54f5e9832f5755278e72acc9cd41a2c0/wobufofofowenufam.pdf
    • https://youkuvpn.com/upload/files/ligugep.pdf
    • https://piataafacerilor.ro/app/webroot/files/userfiles/files/savarivesazuvuradik.pdf
    • http://www.novosib-sport.ru/ckfinder/userfiles/files/nawazemuxupivet.pdf
    • http://dpsnowodworze.pl/userfiles/file/38802360642.pdf
    • http://p-itos.net/admin/userfile/image/file/desoketunepubodul.pdf
    • http://randygordonlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wudufemuvobumagesazowu.pdf
    • http://amsasecretariat.fr/userfiles/file/4939776607.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614256ce9fc09---dofeveropawuze.pdf
    • http://marthomaiticherukole.com/userfiles/file/52637826678.pdf
    • http://ksklinika.ru/ckfinder/userfiles/files/85633502958.pdf
    • http://angerdress.store/ckfinder/userfiles/files/xogixijopozitewewem.pdf
    • https://patidarpalanpur.com/web/k/main_admin/ckfinder/userfiles/files/faxulipijajorewixi.pdf
    • https://www.sibirprokat.ru/ckfinder/userfiles/files/buganolemojode.pdf
    • https://totounited.com/contents/files/pepazomiwixutunamozafisew.pdf
    • https://sudhirsachdevaclasses.com/ci/userfiles/files/98859726159.pdf
    • http://gz-chengeng.com/uploadfile/files/zutenoguziwikefe.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=the+conjuring+the+devil+made+me+do+it+mp4+download
    • 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_off0000da74.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA74 16792 bytes
font_01_sfnt_off0000f286.bin
2ccf341757467c4ae4d9622b4d6b4c0aad31e7dd240e3115cc7e091555d5890c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF286 19992 bytes
font_02_sfnt_off000126c3.bin
1f194395d2cf0c6e041a870afddae72198c5ea2d97bd09a9ce0a104735493630
pdf-font-stream PDF embedded font (sfnt) at offset 0x126C3 11216 bytes