Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a29fb4088df0c55…

MALICIOUS

PDF

84.8 KB Created: 2021-07-18 01:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c3b8d5497fdf6058e5f5ab2ac320c575 SHA-1: b65a1d4d5dabf1bd9936b11aea160b63f638d9b7 SHA-256: 0a29fb4088df0c557a099652dda7b22e41d07e55363a7f5fd6e0bca3a7dc6ad8
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous URLs, many hosted on domains associated with compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://revucue.com/ckfinder/userfiles/files/97354084756.pdf In PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/d495deb7f85d08b58fa218d8bc340a48/9611553511.pdfIn PDF document text
    • https://greffedecheveux.center/upload/ckfinder/files/70716811105.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f105b0f985---mudabajufugevikegemupix.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5bae42441---xututelezeterisajerone.pdfIn PDF document text
    • http://pogservice.ru/userfiles/file/xinepijex.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/37971724c427528dc78ca0ad2e0550cf/bopomisulufuxiw.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/82530088133.pdfIn PDF document text
    • http://whs1979.net/clients/65916/File/xemitapavomoxukezubazoji.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608782d3a20c2---xojurarezutubemarivov.pdfIn PDF document text
    • http://medicamarsala.it/userfiles/files/28608309702.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/e64f85f2858de4c5579298f35e6a681c/1745862775.pdfIn PDF document text
    • http://chineseclothingonline.net/File/33791899647.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/mv4chsd5jbib6e7m0hcl9t33e4/wakomoresidivunuwalikizan.pdfIn PDF document text
    • http://atomleasing.ru/media/File/55718856176.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/1ai3gl6kj7itlcv9epqfr2htj2/lupugavagobukotifasupu.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/beselinumavogeruzewafi.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/8c621e19896b85e3b790eb1123d73c4c/66086435299.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/xikexokamifolijole.pdfIn PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/92387420931.pdfIn PDF document text
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/h5375jp8qrb672aoqh68i2tsdn/28334911362.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/42409147478.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=app+fortnite+androidPDF 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_off0000eb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10358 16836 bytes
SHA-256: b1fcffae8114a830272200f2c634dfd5d36fe1e039d173da322643b0098eb23a
font_02_sfnt_off00012f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F02 10256 bytes
SHA-256: 389cbe0fb0794fc896e9f3cc4101af4ab1f82a2abd90c83e7da1dbc27b3ff36c

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