Malicious PDF — malware analysis report

Static analysis result for SHA-256 2115898d4fc2cb74…

MALICIOUS

PDF

78.2 KB Created: 2021-09-01 00:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: be9e4380265162e3a90b2913f1743af2 SHA-1: 99b58a35ae912b614a95160a40f7aa55a0555831 SHA-256: 2115898d4fc2cb74b2720f1230959628f1e493799da8181e826c95ea4561e93c
184 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple URIs pointing to compromised WordPress sites, suggesting an attempt to deliver a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of a raw IP address in a URI further supports malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607281ec369da---79116689849.pdf In PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/07e7ba760434e6a8f6ec6045354e929f/rokitalobikejazeg.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16083a3e705eea---28915527992.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/90892769607.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c6c86a596---35085517044.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610baa6603a85---87905140049.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/kovetezixek.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/muponimagiseda.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6447344ee---dinujebu.pdfPDF link annotation
    • http://3e-recycling.ru/app/webroot/filesfiles/murek.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/d17j5gvm45kusggu5n2tc1olva/meletaminufatobikifojena.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/42822610885.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607fea7b8d813---454664301.pdfIn PDF document text
    • http://secretinvitation.net/images/files/91122138716.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/vizinodi.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa0ec2af23---fipuxala.pdfIn PDF document text
    • https://concertwristband.com/resimler/files/37475413942.pdfIn PDF document text
    • https://avflash.nl/upload/files/32708763296.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f9650f62e---mibunazapuzer.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/99434555402.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/46527774178.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160f3ddfa3d8ac---96269951623.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/808dc75a8ed9fdef7fbd28f753b95bfa/55548611435.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/f4a016954c5cc6805ac2a1ff4e490b41/84365838958.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/99460922566.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/0f11dd94d1b3dacd69d9dfce0a31b047/jofukavujefakuket.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=call+of+duty+cold+war+pc+torrentPDF 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_off0000cc4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4B 10684 bytes
SHA-256: 60c6731d98a55d0df3419d9345dabe88dcdcf885a497d193828fa1cfe4a2a328
font_01_sfnt_off0000e511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE511 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD23 17744 bytes
SHA-256: d68e8b708edd0183a12326886791f2e09f24fd8d669a99b8f3dc27f7f37cbb91

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