Malicious PDF — malware analysis report

Static analysis result for SHA-256 babccedca0a33105…

MALICIOUS

PDF

80.2 KB Created: 2021-07-03 11:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 105eb6ec85493473cf4e4516ddfab83c SHA-1: 92d376a8e067da1927387987759c53c3f4deaf76 SHA-256: babccedca0a331055c57982a0f976fa81869441875acd17166b7ab2cb4303e27
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple URLs, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve a second-stage payload. No scripts were extracted, but the structure and URL analysis point to a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://chi-kara.net/userfiles/file/dinapapudutabivevex.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5939e231be---nabutageripomozaj.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4476c76d8---83317804500.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/v2t5lgihkjsc807pp88cbitbpb/duxogarozesuk.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609be9756ca35---wosalimifezonudekazobapo.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/pnnbh824ou8r9bujjnkoda31r6/pilapuw.pdf
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/c7a09987980ce016a40b05dacbc7ff77/metisulinovifofav.pdf
    • http://xingyeknitting.com/userfiles/files/wikesajinukarevataret.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/f2702b34f12bf6e6a9d5851144428845/ranaxejufufawifasarojif.pdf
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/d47793466397f4e109669968f94b7538/92812658453.pdf
    • https://textosolutionslinguistiques.ca/upload/editor/file/zejavexovotu.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8016d3b78---bowonuvigolijifevuzejobig.pdf
    • http://thedewakohchang.com/image/upload/File/8881047721.pdf
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/8039221919.pdf
    • http://fashioneducation.ru/userfiles/file/domadogorunejozetuxuvu.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/19djq40qet6k00hdsoj292bnjs/jerejipodubiwo.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/6357cd48fd1ed395fd01308eb99fd896/80830285368.pdf
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/fvnv9ia5todnvemvpbeel2oj88/18030031178.pdf
    • http://tasarimak.net/ckfinder/userfiles/files/52874579377.pdf
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/sawarebexa.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/b4695332597de46d8b3339da799ade1a/fusosodeze.pdf
    • http://blesk-stroy.ru/userfiles/files/99019618530.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a452b6aa3e---88734314156.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6482b042b1---muzusebasilesi.pdf
    • http://ajtoablakcentrum.com/_user/file/raxuxokepulufazuvunagevu.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f19736a692---73109282257.pdf
    • http://1984wnhs.com/clients/2/25/250e0aaa51dad033202e6c34d8602b4d/File/zuzit.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=new+english+file+elementary+student%27s+book+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_off0000d5f7.bin
8ddd19bf4bf4806cc4f55429cdd370e06f963d2c80139cbd6520af5baf09666a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F7 11488 bytes
font_01_sfnt_off0000f09e.bin
a45de7ce4244c0e5d0e0f81d023fe55646333af12984ec9f743516f0fad4fa2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF09E 16512 bytes
font_02_sfnt_off00011b0b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0B 16792 bytes

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