Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d0be5fbe3e6619…

MALICIOUS

PDF

81.9 KB Created: 2021-09-07 09:15:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b252383137388697900d9b3ebcc67e16 SHA-1: 17528e47a3ec82d25006b831e6f8a0921d6c0da9 SHA-256: e4d0be5fbe3e66191d2c721f3942a6573e67d6be5008434d11e82b458470ba2c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The primary attack pattern involves leveraging these links to potentially redirect users to malicious sites or for SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/ir04as4mom8e0812u8jrb30ft8/vuxebuxutu.pdf In PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/uq9u74gb8c2i6hak9nvs7ev2s0/74435483521.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/ligemojoratebidixij.pdfIn PDF document text
    • http://ginzaoakland.com/uploads/files/tegutukerof.pdfIn PDF document text
    • https://eagleegg5k.com/ckfinder/triplebuserfiles/file/47180057441.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/b5a488d6d8f70abb753a31b3bddb2e27/30534687362.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983ffc8bcc2---dazarusewarelinu.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611205315e436---74522271409.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/bc1ee9d148202d9e20b37ef56aab9a36/30571243936.pdfIn PDF document text
    • http://sammyuriasproperties.com/userfiles/files/zuzodawe.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/dk3fracldaotlt91m5jf6furmh/wetuwululumarozubano.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/qrgij2otdv7s9fnssesi5sujkc/57352556671.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a7696afeb---39432315905.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7367416097---balobazobakeviwazow.pdfIn PDF document text
    • http://ilksolar.com/Images/Media/files/2290882725.pdfIn PDF document text
    • http://ansing.nl/userfiles/file/26594573476.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd6b7db51e1---padavinasuzinonenem.pdfIn PDF document text
    • http://www.logomarcanet.com/userfiles/file/64075210520.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/425f3c1c8965a1a481140d4f2e1fe1b7/47147257533.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/3affbe7f44df3195a2aef3ceb4a15fb6/23832075889.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/589ba03fed7be4196433bc75632ca95c/46580169919.pdfIn PDF document text
    • http://guyfamilyreunion.com/clients/41950/File/69486410694.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc2996cf76---zudatowoxogirumupawoxifi.pdfIn PDF document text
    • http://blevy.com/ckfinder/userfiles/files/xarunasakegigamupod.pdfIn PDF document text
    • https://gsacademy.ge/uploads/files/53018402160.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=respirasi+anaerob+fermentasi+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_off0000de5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5E 16464 bytes
SHA-256: e1c058b67da5c438060f34f3db9f23dad50bc93e0a3ab873f369ab7e7a58e01d
font_01_sfnt_off00010948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10948 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001215f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215F 10800 bytes
SHA-256: 1499257d06933fc51517eff79c82664e071254a2153ae4c8714e5633847e5c05

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