Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e2f7f428bf6f4d…

MALICIOUS

PDF

89.2 KB Created: 2021-07-05 04:01:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1e07c0cd5545ab235df7c07fb3ef46cd SHA-1: 16ec7936fd1f11c5472a5b125f0bfb7249206c8e SHA-256: 93e2f7f428bf6f4d8f0738633bc72ff210db65fa481560095a83414f0b9346a5
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, which in turn host other PDF files. This structure suggests a link farm designed to distribute malicious content or lead users to phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a96a24dd8a9---30956895843.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983eec3a95e---terekakozadebar.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/5118f056980e8a91826a54fe8a3fb800/96386072495.pdf
    • https://santevita-bg.com/ckfinder/userfiles/files/36790914001.pdf
    • http://grandp.ru/userfiles/file/liteguwosisadepogatuwo.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/69fca09184ffabde7feb1f598a52ccf5/76772232049.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/1vscdbebuhvgt9j1jt39qkbqb5/7982275160.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be5435f0e1a---pokon.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16070b6af48f6f---lidamixuvupejubidiz.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/964b3b7a4da763c6c21b398356329d96/nuzutodamaragufevudef.pdf
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/c8aea76b2c73f488f64b5c8e2c3e8562/6746957141.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b01bc454d64---35574299358.pdf
    • http://allmedicus.com/userfiles/file/dejalegisetutawedupafer.pdf
    • http://mountcalvary76.com/clients/9/90/9062e1c9f2360b2cedac6e2854879500/File/89901209135.pdf
    • http://fzcce.com/aimgs/uload/files/78819437334.pdf
    • https://fanaf.com/article_ressources/file/12779326924.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ba8b171f7---samonomaludavogenuwosoje.pdf
    • https://giolog.biz/images/bulk_images/files/kuwek.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071236be5687---jotalizafedumujigemu.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/q4ctopks2tkuiokrqpc698ak1i/86632715011.pdf
    • http://herningbadintra.dk/app/webroot/upload/files/vulozolisebulizubuwezupog.pdf
    • http://www.sport-konyv.hu/userfiles/file/66820970157.pdf
    • https://dpengineers.info/admin/userfiles/file/28244545485.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=2+stupid+dogs+let%27s+make+a+right+price
    • 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_off0000f77e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF77E 16792 bytes
font_01_sfnt_off00010f95.bin
417e6e02bbb0464e363e7481583d714bb043db39fea6cc7ed9f63b5103d0f4cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F95 11108 bytes
font_02_sfnt_off00012960.bin
4c7529d652274b7cf59fe8dd3c62b36fffcbc67133dcb2a7387fbfa80f0b8866
pdf-font-stream PDF embedded font (sfnt) at offset 0x12960 17580 bytes