Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d0e4dae7f3abdd3…

MALICIOUS

PDF

87.6 KB Created: 2021-09-01 18:10:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 78fae137a441af968b12b346bcc7b2c2 SHA-1: 7b0d0fc8c6c5d43c52e7c3335e4471e748428773 SHA-256: 9d0e4dae7f3abdd39b078cc6b4cbb76b2c384feea86e218d1a8b7f56fa17a972
156 Risk Score

Malware Insights

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

The PDF file contains a large number of links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains. This behavior is characteristic of a link farm used to distribute phishing content or malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://philabc.ru/uplcv?utm_term=gravity+method+of+geophysical+exploration PDF link annotation
    • http://yangpupark.com/uploadfile/files/2405209179.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/wafalitikutaru.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1215a30a02---62435730611.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/41734714508.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/hc0jpb8k6urgbulnb4i5p8bjgl/66857701224.pdfIn PDF document text
    • http://derma-dts.de/files/file/48620004347.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607497e9f305f---sirojovakewuxafakaxo.pdfIn PDF document text
    • https://ngonluathan.vn/images/ckeditor/files/36321205234.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b90b2a4f9e---kalujolo.pdfIn PDF document text
    • http://findmecakes.com/userfiles/files/99978588560.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160847217e8128---52405668683.pdfIn PDF document text
    • http://au-coeur-du-temps.com/userfiles/file/19636096209.pdfIn PDF document text
    • http://cy2hand.com/userfiles/97592331016.pdfIn PDF document text
    • http://tranhdaquydep.vn/upload/files/tesizawajek.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/lec0es1ndgsi69nqteovudo6hh/70281390364.pdfIn PDF document text
    • https://dcimx.com/files/2431403629.pdfIn PDF document text
    • http://drironcat.com/images/file/gixedugixap.pdfIn PDF document text
    • http://hmconcretemixingplant.ru/d/files/22631300881.pdfIn PDF document text
    • https://producedepot.us/userfiles/files/40871295886.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611aaa8e64fc1---25389580745.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608343d06f13c---xitox.pdfIn PDF document text
    • http://lineshare.net/upload/files/20210714105709.pdfIn PDF document text
    • https://magerp.org/upload/files/temosifolatupekokezolew.pdfIn PDF document text
    • http://ekopaczka.pl/imgbrama/files/51660169140.pdfIn PDF document text
    • http://jonesfamilygathering.com/clients/2/28/28a2af4908f4fae7f70f8b91082c1e08/File/34587082070.pdfIn PDF document text
    • https://comillaspostgrado.es/userfiles/file/61030708571.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160cd880a0679a---50627473126.pdfIn PDF document text
    • 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_off0000ef05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF05 11388 bytes
SHA-256: 4f90b1eeb6240cd92c673d3905230a3debbd90ea4347b15d527d0c93cccbbbfe
font_01_sfnt_off00010990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10990 18024 bytes
SHA-256: ac56881f4a84822c528c9482e68e21892586d78bd26e1f7e3795801e4d95ff27
font_02_sfnt_off0001379f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1379F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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