Malicious PDF — malware analysis report

Static analysis result for SHA-256 b74188de8829cbb7…

MALICIOUS

PDF

92.1 KB Created: 2021-06-30 03:45:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: fca4888d746433aa29ed865b51830dbd SHA-1: eec7896c735dce8289e268f63929412fb25f3292 SHA-256: b74188de8829cbb77c09cc7b1eb4dca22c2e7a6a8f22b49c3b8100e4518c6da4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c90b75648b9---88954321126.pdf In PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160822436be4e4---fuwegufegetavorevezuxar.pdfIn PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/52523381842.pdfIn PDF document text
    • https://nadamasristorante.it/file/ritawel.pdfIn PDF document text
    • http://premium-t.info/files/files/fepezipisubip.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/65d48d87afe29c9bfb0eb4ac3e52165d/53404136943.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160b37a2a1021d---16574164678.pdfIn PDF document text
    • http://houselandia.ru/files/16011697205.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/qeb76obust8mrdmt5i0qtkelub/nusitokapufefodozeb.pdfIn PDF document text
    • http://vnos.vn/app/webroot/uploads/files/sozewamukematozaxogafumur.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b70e85e8d17---doposul.pdfIn PDF document text
    • http://araonline.hu/uploads/file/kewuveduxifogefur.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/6efad9fafaf307d0dd868d6e188e7ac2/nururej.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/sdd1hd35du6kvtu78oahtulp75/85010376307.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/6a150fed665441968d9934e0bf6da703/degiziguvizumotinesu.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/caf77a5969b7646aa9c9e4be319fb7dc/gofejirebodebiwowavol.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/a37d64054ba7bab6615621a9199e2ebd/mizisoverekasesor.pdfIn PDF document text
    • http://josephlillianmorrisfamily.com/clients/59960/File/57609640569.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607b86a896b2a---90751793444.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6d5d377201---82703149857.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/mkg9slralcvelf73o82q1m2946/jidivutebovujesulugegi.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/46905022332.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/b2e074403d7aa2655271dd4869db0cb8.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/796412b0f533c2aaff8144f6c9209352/41554265071.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608480a8c25a5---83670192943.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/ce301f683150f234c9bfa39b9c788664/3862202221.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/uek2c7tqkj50gm3crt49lfdai2/72968246489.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=darren+hardy+the+compound+effect+pdfPDF 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_off0000ffdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDF 10792 bytes
SHA-256: fd4580f952a5245a50d35fe0a66a78e44e6f2eb620528941d33e2cc12b455388
font_01_sfnt_off00011889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11889 18456 bytes
SHA-256: c81593c6e0c7fc68fff0ee8ec2a653e56da9abd3c77edcd7bd44576a75d0f1b1
font_02_sfnt_off00014954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14954 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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