Malicious PDF — malware analysis report

Static analysis result for SHA-256 8db289fa5da1e3da…

MALICIOUS

PDF

81.5 KB Created: 2021-10-06 05:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5cb5b17076c0a812c03b1a27e1d143df SHA-1: 3260a5f387867b884d674bbafc5cdb6f3c16166a SHA-256: 8db289fa5da1e3da6da74628173eccc7821bb0caf91d13f602d80806505d0438
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, with multiple heuristics indicating it's a link farm pointing to potentially compromised websites. The PDF contains numerous external URIs, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly suggest it's used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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=natural+resources+of+balochistan+pdf PDF link annotation
    • http://olsztyntransportmedyczny.pl/userfiles/file/42983169234.pdfIn PDF document text
    • https://tattica.byespresso.com/app/webroot/files/upload/files/52848190583.pdfIn PDF document text
    • http://letdentalab.com/img/files/pepum.pdfIn PDF document text
    • https://pratham.one/file/jatilevuvitoxaxi.pdfIn PDF document text
    • http://terminsk.by/pics/files/tozavuzidazivirasuganuna.pdfIn PDF document text
    • http://agriturismoilnoceto.com/userfiles/files/29499665496.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/a6c48057a8392efbfd6c3e51d7b57d58/renamapikojewige.pdfIn PDF document text
    • http://ezclasssites.com/var/wwww/dev-ezclasssites-com/data/files/likavitelaze.pdfIn PDF document text
    • http://xecuoihuyhoang.com/uploads/userfiles/file/13854060027.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148b30b15f4f---mapotel.pdfIn PDF document text
    • http://xn--42cfa4ewb0a0b3fwh.com/imageupload/files/fezugekimibesetivuw.pdfIn PDF document text
    • http://phayaotechno.com/UserFiles/File/47096237637.pdfIn PDF document text
    • http://rcot.by/pics/files/22617005426.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/68046240995.pdfIn PDF document text
    • http://camonetinternational.com/files/file/40750578281.pdfIn PDF document text
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/62176835736.pdfIn PDF document text
    • http://katour.ru/admin/ckfinder/userfiles/files/xajelozujagawonewironigi.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/juctlqgsnejmjncibh7071tcl3/sivafek.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/be0e8db2bbe1b8459b8412d3a12666ab/59043636115.pdfIn PDF document text
    • http://www.smartusb.info/images/library/File/83538499285.pdfIn PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/ziderobojijoxirag.pdfIn PDF document text
    • http://bischofs-scheune.de/userfiles/file/tolabodoxutu.pdfIn PDF document text
    • http://393citizen.com/upload/files/18167381686.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/jolovusuxerebe.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_off0000d847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD847 10932 bytes
SHA-256: 1ee2982145167a79c0c06a5f3687bfef0720c8e4c366045e612d64018c972b7a
font_01_sfnt_off0000f151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF151 18272 bytes
SHA-256: 2626fa7b6e0a3946c3003af300e3db3331d5b3a391f90811cd188b45b0c24b7c
font_02_sfnt_off0001201e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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