Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8567af203195ac0…

MALICIOUS

PDF

72.0 KB Created: 2021-09-27 14:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 61c63dd3bc5152015b1587758e37e564 SHA-1: 5edfa7110e1dfc309ba2bea49c4ad78cd79cde6b SHA-256: b8567af203195ac07b670194f31fa24f47ae04a67a34daa00d7f89620c20e124
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to external sites, several of which are hosted on compromised WordPress installations. The document body is unreadable, but the heuristics and URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c00481aa63---62574217002.pdf In PDF document text
    • https://minjar.mebel18.com/uploads/files/samogegumumikukizuxosuk.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613df4aa7d0e0---jeziwujulikira.pdfIn PDF document text
    • https://almuhja.ps/ckfinder/userfiles/files/rumigilerixukaf.pdfIn PDF document text
    • https://sistemagestiondpr.com/userfiles/file/kolegupi.pdfIn PDF document text
    • http://iknow.pl/files/file/rimiguxitanenedajexibonez.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/21384089127.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/5aae20cd43a8f79146ba116896b8164c/goropopozew.pdfIn PDF document text
    • https://hn-as.dk/sites/default/files/userfiles/file/9965920211.pdfIn PDF document text
    • http://studio5r.com/userfiles/files/jozixivurixagagev.pdfIn PDF document text
    • http://otohondamientay.com/upload/files/mesimefozelajidamakefizi.pdfIn PDF document text
    • http://csc0311.com/userfiles/file/20210926080515_am8tyw.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/nurigedekelexixena.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/8ab3590a4341661abbd40552a9f5c97f/65868581376.pdfIn PDF document text
    • https://sunpower.lv/ckfinder/userfiles/files/gidefarudupoziz.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/zotozasevi.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/89511676575.pdfIn PDF document text
    • http://dispensapertutti.com/userfiles/files/30982763249.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/wojesimawewirokopoboriwam.pdfIn PDF document text
    • http://archpiudue.com/userfiles/files/vegobemevudegadizi.pdfIn PDF document text
    • http://hijoin.hu/editor_up/7328710499.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/74934112241.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/fec0884a4bc169f5fd419414a0157253/44935267413.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16135a57248dc4---zupafadizexalozo.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/83f0c2deb1660b1b3ecd90bb977d8e9f/65490519555.pdfIn PDF document text
    • https://ichapps.com/ichapps/ckeditor-ckfinder-integration/uploads/files/18600994561.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=phone+finder+for+alexaPDF 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_off0000b7c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7C9 10288 bytes
SHA-256: 69549f8dfb25107d472c81dd7f204c0e564b57db1b9895ef4326db37750f3659
font_01_sfnt_off0000cecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCECC 16996 bytes
SHA-256: 6fe75c891d4dc4d93a074f2e9df71f343cadb60ca2502c88e1d8b8180c29b5f8
font_02_sfnt_off0000f9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.