Malicious PDF — malware analysis report

Static analysis result for SHA-256 009b22e5e0a893a0…

MALICIOUS

PDF

84.4 KB Created: 2021-09-01 02:15:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 522e1a10087b908591399c07a812504d SHA-1: e1086d23e89af71f23f05cd87c8d194d63ebda38 SHA-256: 009b22e5e0a893a0e245d3fd7804db7be5389d3d102bebef772560429d7129be
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, characteristic of a link farm used to distribute malicious content or phish users. The presence of external URIs and link farms suggests an attempt to redirect the user to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://shoppingplanet.ro/ckfinder/userfiles/files/35102875135.pdf In PDF document text
    • http://sportingfoundation.com/uploads/file/muponume.pdfIn PDF document text
    • https://123natura.com/stockages/files/tuponinipijosixajaf.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c872aacfd7---ronejujan.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba36e92f42---fenewerikefitobefiman.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/pipakelorapamavij.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/jshqianq4ncqjmv3ug06j8etr0/6364344279.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/11b80cfa1f2de65ec106973929852bfe/tenafenizoj.pdfIn PDF document text
    • https://store-connector.com/_upload_bilder/_filemanager/file/rejotijawigutusib.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/0udkpjda5seqjcbi44pkcsjis1/17068556327.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/0d26e2d106a513572d3666efd6ba1389/metesidikujokelesu.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/48156161374.pdfIn PDF document text
    • http://k-souz.com/userfiles/file/25795397894.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/kg4qqg8nl7oav7dg98g6cs0g11/wijulival.pdfIn PDF document text
    • http://roanfamily.net/clients/0/01/01b24a6c100194bbc8678883f3cd4a53/File/6247767609.pdfIn PDF document text
    • http://perchegouet.com/ckfinder/userfiles/files/39950854407.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073e7e08f9b6---lanemorapeguruwopizulaza.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/79b139731761862d1d4ef32117070610/kujelimoguredolitunaz.pdfIn PDF document text
    • http://westleyden72reunion.com/clients/4/46/469dc9162705cbff2d1fbe132f144f37/File/83767698844.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b500a0f32---89868180079.pdfIn PDF document text
    • http://olgapolyakova.com/files/files/83309561576.pdfIn PDF document text
    • http://ty6600.com/userfiles/file/89439219824.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160b047b50633c---zikubarivu.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/31300518523.pdfIn PDF document text
    • https://cantarefides.ro/admin/userfiles/file/sefabivuvolujukazi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=the+first+chapter+of+harry+potterPDF 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_off0000e2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C8 10504 bytes
SHA-256: 57969acd4e7a4dbdd7a739121700a0dc8e82393f22ebecd82337ccf71fa5ddde
font_01_sfnt_off0000fae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE5 18876 bytes
SHA-256: d7a8bb1da721453bcee894680fa366a6870474bff1ad2a12e6ef9015bdc5ebd1
font_02_sfnt_off00012b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1