Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d200d05a37f9634…

MALICIOUS

PDF

94.6 KB Created: 2021-07-24 02:42:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fa773c1b4545e2b48e6e7ec52a5eea7a SHA-1: 44dbcf9127cd5f6b76952babc1608ce537a10a64 SHA-256: 9d200d05a37f9634ade1e64074ca6cfb00528b26e4a0dc20244a8309a80de457
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, with several heuristics indicating it functions as a link farm. Some of these links point to compromised CMS upload directories, suggesting an attempt to host or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://roweryelectra.eu/app/webroot/uploads/file/1619871577465.pdf In PDF document text
    • http://dunajecbiala.pl/upload/File/2070651567.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/f7d24fe9df9829171fa6a7b09a9f299a/61060504811.pdfIn PDF document text
    • http://vinhthuan.vn/upload/files/50999132995.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/zibelefupi.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160983d8c99025---buxogutekipanexef.pdfIn PDF document text
    • http://conroeclassof72.com/clients/d/de/de0acc14889d5d69ce6a2e221f3e79cd/File/fubabajukukewus.pdfIn PDF document text
    • http://sshs1962.info/clients/3/33/33dcd814b32da85629335a95ab3d0158/File/55318148616.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/mejekofejigabo.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf02825523---94667016377.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/7f752b3493466c025726c90784d8e53c/nawadabax.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609410d1a3693---74101632016.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/nidi3jneljtj2baph4r8ifl5p5/faroxifowuso.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/1b9ff53113f5ed234bfa904a692dd0b2.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16092c0385c530---vasiwipiduvekonupazogolo.pdfIn PDF document text
    • http://rutherford58.com/clients/5/5b/5b2824e44de76337c32dfcbc3ee6dba3/File/legatozetopemutob.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/ecb153e6f7b2f0c8ac10674ea05e88cf/wusofoto.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/21485290123.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/27c962fca03f3aa186cbd6a19da272e3/44536530863.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1609f518104242---sarezijib.pdfIn PDF document text
    • https://hgb.se/filer/file/nutajiruxizanewabesilanug.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/3amtm02i81r268005inovi8in4/35252712409.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3915da5edc---nuxopi.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ffa13f790---91477552107.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=when+was+the+solar+eclipse+2020PDF 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_off00010dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFC 10792 bytes
SHA-256: 0bf66a9978aa3554b2d602c36a38ec937cdaa194b6e47640963447cfc9ede9f9
font_01_sfnt_off000126e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EFB 17240 bytes
SHA-256: 330d06f5648c1cd56666111fe235f815aeaf1738e3eb39b0e6c8fa9bacf3bfec

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