Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbb2f4e85eb5c0d4…

MALICIOUS

PDF

86.7 KB Created: 2021-07-14 05:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 50b6e92acbcfb8fb72a7de35e42aaad6 SHA-1: c34a587f958d7d6e2f571467b4c32f603774eb84 SHA-256: fbb2f4e85eb5c0d431b3e2bfc0f514413d757cbf862bf4c9aae4ee881c5c3da4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://telewebmarketing.com/FCKeditor/file/78365733171.pdf In PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/jb0f74rl6j86ngrcua9sc8ag4r/76268312994.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd34fe9c2f---masiv.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/2bdd406fc648a08c0846fb6bb3138dc5/jipak.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/49384804423.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608858db04c29---jekasurawonijubenigumasek.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160834eeb7fc4c---73305743756.pdfIn PDF document text
    • https://maintogelonline.info/contents//files/47965344781.pdfIn PDF document text
    • http://helloshoppingnepal.com/userfiles/file/16644638224.pdfIn PDF document text
    • http://studiogiamberardino.it/userfiles/files/3965476538.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/9011069849.pdfIn PDF document text
    • http://ozkayalartrans.com/userfiles/file/40476409308.pdfIn PDF document text
    • http://nuovartea.eu/userfiles/files/pudazolexenixisevikel.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/14204988165.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9cb02c733---vexobuwexat.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c7887d129ce---73459340633.pdfIn PDF document text
    • http://best-infosystems.com/userfiles/file/17036515518.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/eas6m74afnf4mppv6uqva30f0u/robawupozodapomomatoso.pdfIn PDF document text
    • https://mytalk7.com/_UploadFile/Images/file/53735784948.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/87359551143.pdfIn PDF document text
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1fca4dcd2f---15253636692.pdfIn PDF document text
    • http://com123.vn/uploads/file/3789324625.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/778931bd65a2b4e7b9af217221b392c5/felutuwunife.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/9b9cd97297e69a58ab0f6facc9b0284f/zadejuruvebirapu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=house+payment+forbearancePDF 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_off0000f138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF138 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001094f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094F 10848 bytes
SHA-256: 2deb500b54f340892c85d5b4a33d17ef520e20854fae2e8a43baa6af04b5d88f
font_02_sfnt_off00012232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12232 16720 bytes
SHA-256: b622590d67bf9fc16a3ebc2e6015e70e5b54246dc3bc84b7fa27ed183de727ca