Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba3bee6c75f94c12…

MALICIOUS

PDF

79.1 KB Created: 2021-09-02 02:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1b04f62ab516440d5778796328344b5a SHA-1: 905242805deb4ace56ec947603a638edc018c1a9 SHA-256: ba3bee6c75f94c12bffddff2d424497ac27dacc14b921dd355fa638257ea9b37
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a malicious PDF detected by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded URLs indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://catamma.ru/uplcv?utm_term=98+mm+to+cm PDF link annotation
    • http://wonsakai.com/uploads/files/viselofe.pdfIn PDF document text
    • http://sieuthibds.net/images/files/21958744439.pdfIn PDF document text
    • https://inprovit.com/ckfinder/userfiles/files/11573595901.pdfIn PDF document text
    • http://amandamaitland.com/images/file/53195659721.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd61dc2477---jopazi.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/6dfd717d060da8c1a7e535efc1685a34/radipaziguwurerubamuzaguk.pdfIn PDF document text
    • https://pinyardim.com/calisma2/files/uploads/16070803531.pdfIn PDF document text
    • http://lutechmed.com/Images_upload/files/texidejijokikinederotule.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/4824194091.pdfIn PDF document text
    • http://imoroz.by/upload/file/kasepobozigoxireb.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/73436645372.pdfIn PDF document text
    • http://www.majbrno.cz/uploads/files/71597018357.pdfIn PDF document text
    • http://depcip.com/app/views/panel/ckfinder/userfiles/files/63944635844.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608fcf7977a3f---titifurinixesagipu.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/113d829b5474465af6ef37facc2d76bd/82560081748.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/85623292676.pdfIn PDF document text
    • http://rebeccaosborne.com/uploads/kanotonosewasozojemab.pdfIn PDF document text
    • https://hirurgija.me//files/52895009559.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ba83667f047---89386884135.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759c880a032---vezogililuxosama.pdfIn PDF document text
    • https://lmcmanager.com/ckfinder/userfiles/files/50834714888.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/lonmmgfpi50sevppcq9ltutu18/zuxubizijakuzefarug.pdfIn PDF document text
    • http://belst.by/upload/file/rebaxoxipududunoxagobu.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/21278430654.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_off0000d31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31B 9868 bytes
SHA-256: b20ed39657c43edf6c78f475c695c9726d8deac1da18a612ed73b77dd88c4873
font_01_sfnt_off0000e8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000100f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F5 17760 bytes
SHA-256: 8ae694a6546f8e33bef56472b8ff6500cc04183cbb92fded7b6b6bff44f64c67

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