Malicious PDF — malware analysis report

Static analysis result for SHA-256 897e29f1e632cc76…

MALICIOUS

PDF

182.9 KB Created: 2021-07-13 20:24:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 26abdeda68ac742ad669ca988a405c4c SHA-1: f4aee0221da22ea5fe51f57187c449b14992be37 SHA-256: 897e29f1e632cc76b13aa21296fc9bd590e49ab107413c378eb8f893fe8eca7c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress upload directories and other potentially malicious sites. The primary purpose appears to be directing users to external resources, likely for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://krisoc.ru/uplcv?utm_term=be+baptized+in+the+name+of+jesus+christ PDF link annotation
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/64002am8alrd43k48ns6369od7/pazoxenis.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608808ac30532---xixukisale.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/85573950681.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/56843263297.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e112c945a---67134800868.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/38888517738.pdfIn PDF document text
    • http://ruihuitax.com/files/file/6441686337.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1608d77a23bb1f---5236478864.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16075036140291---mekatasupiluzem.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/3521596810.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/ae80c07a0f8141b858ed10ed593d6399/tiruxuzawamagi.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/475otimihhs7g0j4tuhqvnhasu/pukenagew.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210525/file/wemukotovurobegigezat.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/84919940807.pdfIn PDF document text
    • http://limoride.net/gallery/file/89664375847.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/jawuterivolunipo.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/e0c0c4793ba5e4c3f805c8d3462861c3/pofijalutuzigudifijizogu.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb0a5ab1bd---73973362018.pdfIn PDF document text
    • https://soechi.id/userfiles/file/rupabakazarorijiluximop.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/6102409384.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/78869986320.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160abc409ac891---33056810677.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b441c9823b7---fibugukejomufetazefigef.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/61fdd65e735538ba761d240550ba8bf6/60925954698.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/cb8958536e0b41abb9e41c1fae6dc34e/68151082408.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_off000259e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x259E0 11320 bytes
SHA-256: 9d4625a6c6be7526269f911098a0dfcd1cb32c8be00e829110f1a90a641dae19
font_01_sfnt_off0002741c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2741C 29172 bytes
SHA-256: 400e23a9c326088ef487c5a9cec34b542af8c18b4865a12ca5ec21ba0060a3fe
font_02_sfnt_off0002b3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B3E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1