Malicious PDF — malware analysis report

Static analysis result for SHA-256 69286bdb028b3d87…

MALICIOUS

PDF

84.9 KB Created: 2021-06-25 13:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 15ea27b7819c604bb06b8e59b2a78f1e SHA-1: 1210a728403911cf77147931750267be62a06a89 SHA-256: 69286bdb028b3d874b50b45cebcf643a12f5dfdc99bce551a9930fe0286f4266
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains numerous links to compromised CMS upload storage and disposable hosting, suggesting it's designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and link farm nature indicate a likely intent to lure users into further compromise, possibly through embedded JavaScript or by directing them to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://simonhoirup.dk/userfiles/file/75964884038.pdf In PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed4b762958---44653106792.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/semativazexibepujezapaviw.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/68956923083.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160d42ee817323---xugalamijexupux.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/0d826fed0efba5e51a5f827a77f9da43/nevodemotifedakabafofik.pdfIn PDF document text
    • https://gmnavarra.es/ckeditor/files/73093276928.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608b128f96791---66425243251.pdfIn PDF document text
    • https://papiratisk.cz/soubory/dutipiwop.pdfIn PDF document text
    • http://notarbrazda.cz/userfiles/file/6072948272.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/31526723003.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/32749993173.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/74930889204.pdfIn PDF document text
    • http://soudurelauziere.com/upload/editor/file/mejoxomuxuvajamoj.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/0dc8902246b262b0702a8421298cf063/54853274547.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c2ad5cd60---pojinuzurisukivunisasuz.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/vimiwuvuraniwuki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=back+hurts+when+i+lay+downPDF 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_off0000e8c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C7 10912 bytes
SHA-256: 9f576771a09028c751f862a8d1665bfc0ae6f88189440c927551194cbe0c8cb4
font_01_sfnt_off00010222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10222 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A34 16604 bytes
SHA-256: d766e1fdf4b928f89dd03fb9756956a795d0cfd0f0996ad80f67890bb4f7b07f

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