Malicious PDF — malware analysis report

Static analysis result for SHA-256 b49adb181af10449…

MALICIOUS

PDF

86.4 KB Created: 2021-07-26 13:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5623852784e3afa396c90fd57fbda0d0 SHA-1: 787f252bf647e2725f34b25b1b82e51181d7bcb3 SHA-256: b49adb181af104496558f6c3dd9e4709fbc84743faab35a9ea55bce45c56d4b9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites, suggesting it is part of a phishing campaign or a distribution point for further malware. The presence of PDF link farm heuristics further supports this, indicating the document is designed to redirect users to malicious content hosted on these compromised sites.

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 http://gdwtechnology.com/fckeditor/file/polekireduvulizoge.pdf In PDF document text
    • http://dfwsedan.com/nbloom/fckuploads/file/95518233976.pdfIn PDF document text
    • http://kehlux.lu/userfiles/files/46397399270.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607267dbc2914---31293014543.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/teii7ei1loij3abh4d7k4hi1h0/68293383862.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/2181decc2c58680eda173521a2005705/44451332125.pdfIn PDF document text
    • http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/8581305320.pdfIn PDF document text
    • http://czechdidgeridoo.com/admin/upload/file/77343599938.pdfIn PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/94511152173.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210613092719.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f78d1268e85---mupofa.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/66651216576.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/54c50372b3be88248c82cda0229aa9e8/99282452262.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/79153788728.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160719ddd65b1c---zegedo.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bb6fdfbac6297075bd6d116770732cd6/51060877914.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/7dcfcd5727b27e44320b57466648ed8c/ketemuvufev.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc9a3c94ab---19753361347.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/54649056670.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b85edb53c9---nesusepetudupemisejekik.pdfIn PDF document text
    • http://iccarrentals.com/files/file/46287135108.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ec178a7c9---vejotemudofipo.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a56f32e339c---15705003224.pdfIn PDF document text
    • http://ledson.ru/upload_picture/kupajibafa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+many+questions+are+on+the+constitution+testPDF 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_off0000ec82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC82 17424 bytes
SHA-256: dad0c094464c5f8155f8e29646cf8973100b67f1a82443e1d00cd10428336c1f
font_01_sfnt_off00011a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001322b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1322B 10888 bytes
SHA-256: ddfc5cf1cc05f7e17d1022527f79d72d5a82c2c3c65a93fc7e861c5e17f52e9b

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