Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98ea98f2fe5441e…

MALICIOUS

PDF

78.6 KB Created: 2021-09-04 05:10:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2119f3525db3b6586ce4a5d57e03ee3e SHA-1: 182aa46555e4b28cf0e936f801fcb062f72b0243 SHA-256: d98ea98f2fe5441e44ac3de6be333d549495390f525a2305832175b082241a3c
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, with numerous URLs pointing to potentially compromised WordPress sites and other domains, suggesting an attempt to lure users to malicious content. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://coretry.ru/uplcv?utm_term=printer+price+list+pdf PDF link annotation
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607441ee59750---savagabakasajokamu.pdfIn PDF document text
    • https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/40745989364.pdfIn PDF document text
    • http://vbs.pl/dat//file/lowuboxunim.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/kd74tbo5ct29usaojreo1rvcti/wifagagasoditujikivomek.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/9ac4bf238a92e435e3c1a157d7d170e6/jadudozoxuf.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/bivuvojowavesirosule.pdfIn PDF document text
    • http://eng.sut.ac.th/tce/2016/administrator/ckfinder/userfiles/files/nuwenevu.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/46957020469.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/69475065132.pdfIn PDF document text
    • https://susta.vn/userfiles/file/35354095982.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bed1c8e6ac0---guzadepudijo.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5284891b0---gobenonuxapalosa.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/153006be42aec084aa4ce29c728d2e2f/65887680150.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941f031b841---63499859799.pdfIn PDF document text
    • http://interiorconsignments.com/media/file/doruxelopapeno.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f31d83c16e---petigakof.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b905f92fac---xudogefukibojowavur.pdfIn PDF document text
    • http://naturestuff.nl/siteimages/file/dufejomukokas.pdfIn PDF document text
    • https://aquatrustfina.com/userfiles/file/vewafijijunoxatesexuwakof.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/jenawagumomonofowip.pdfIn PDF document text
    • https://ahha.az/userfiles/file/77438968381.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f08944d67a---86881932921.pdfIn PDF document text
    • https://kaowei.tw/image/files/20210904_042043.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_off0000cfd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EA 17752 bytes
SHA-256: 8065da716148afa454073cad439ee6059c7998344622f254bc8f40730ecb9fdc
font_02_sfnt_off000115a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A9 10332 bytes
SHA-256: 74e72768b2937c6abf84eb24aa1ea88bd9d8a54d1de3efa5ca0419cc75922ebd

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