Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebd39dd47672533a…

MALICIOUS

PDF

81.9 KB Created: 2021-09-18 13:22:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 702ced0fc1593639eff71f64210d5b43 SHA-1: 014bd99662418e3ba5830285f2e0216b3aa8b645 SHA-256: ebd39dd47672533ab5a54669fdf593602dbc0bcea7e9c180f46d9c28a3277220
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm with numerous URLs pointing to potentially compromised websites, suggesting an attempt to redirect users to phishing or malware download pages. The presence of external URIs and a link farm on disposable hosting indicates a common tactic for distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://oniceh.ru/uplcv?utm_term=isa+brown+chickens+for+sale+geelong PDF link annotation
    • http://jpsacademy.com/slbdavbatala/userfiles/file/66783005484.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d079b11fc---66234114848.pdfIn PDF document text
    • http://museodegliarazzimarsala.com/userfiles/files/maponolukogeme.pdfIn PDF document text
    • https://bimore.vn/webroot/img/files/32124017177.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/f222d19f299845a64bc66b5188f79461/luwogapamikigebojigeso.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/cbce0ef014f3ba208e39a8f7cc4d96cb/vowozo.pdfIn PDF document text
    • http://zabbeleecooking.com/ckfinder/userfiles/files/27267081518.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/49190275506.pdfIn PDF document text
    • https://produktybhp.pl/pliki_user/File/41816414431.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/3041591021.pdfIn PDF document text
    • http://medrea.ru/upload/files/57361744211.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/43307759444.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fafd5e5b7e---95858944325.pdfIn PDF document text
    • http://alessandrobelleseveterinario.eu/userfiles/files/38334938024.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/73267423529.pdfIn PDF document text
    • https://lyna-garage.com/htdocs/cljr/data/files/guzovedamifexopuvovasaka.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/wewutib.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/romiwegifikibuzegutesaku.pdfIn PDF document text
    • https://halead.com/uploadfile/1631873422.pdfIn PDF document text
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/nikoxaxupa.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/83454760502.pdfIn PDF document text
    • http://sooam.com/files/fckeditor/file/374018661613f3bc30bb1c.pdfIn PDF document text
    • http://www.lovebliss.tw/UserFiles/files/sowilulavesogizalamevumo.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_off0000d754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD754 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF66 19164 bytes
SHA-256: ae8f5d14e83a0c5e65843cd3284a35de6a8d1a8d58c17c67eb5dabafdccdfbe3
font_02_sfnt_off0001214e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1214E 10788 bytes
SHA-256: a3aeda160346f123ccfc412a7280946b032baa324e44e21ee5edfe1e21101d7e