Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f9016f62f57fc9…

MALICIOUS

PDF

87.2 KB Created: 2021-07-29 23:47:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ed00247e6b6452c76b919a51065b9a7f SHA-1: b9e1aac17ce96937620e8b10d58dd5829405a4af SHA-256: e1f9016f62f57fc922ca65ec8defdfac6f5761ac437f0e2185c24fb17ac1cb5e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links to compromised websites, indicating an attempt to redirect users to malicious content. The PDF structure and embedded links suggest it's part of a link farm designed to obscure the final malicious destination, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/e28231934d5aaa80989a861805455b90/74662324003.pdf In PDF document text
    • https://evermoral.hk/upload/file/1627087538.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607acc00625d1---wegaroza.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/6aig701q8kg61ft2t6227vq5r2/51394447039.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/346d3b87eb5d816850ed66d6262aabfa/rutokosap.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/7b0cea7681b62fbf29eb05eac174a9e5/jelisozobewar.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a907165036c---gosawemovaxirekozap.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/j8gpf8skp3pmngfjadpsr45qfa/zoxokuxen.pdfIn PDF document text
    • http://emannsltd.com/userfiles/80993620472.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607708164ee38---difilumefa.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/4bef303f266e0a455754034e2951064c/67315999156.pdfIn PDF document text
    • http://efuturesthai.com/uploads/file/55336339671.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/9153f208b8ddab7c9df99e9e2cfadc28/witan.pdfIn PDF document text
    • http://aimic.com/userfiles/file/jixudetixaxepikimizu.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2f38e6aa5cf7558033e29eff8809d3dc/zawagazipanokizilifo.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/908fb96091a7bf8c0643644f5aebd28a/zagotupekodipedefab.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813421665c7---58207135606.pdfIn PDF document text
    • http://alkanboya.com/files/file///kupokofefujutab.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099754326b9e---46171840569.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/sipuxevekosowakinadirid.pdfIn PDF document text
    • https://frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/19098269908.pdfIn PDF document text
    • https://zoldlepes.hu/userfiles/file/64921491330.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/vutobimidurunukatojumamik.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image//files/24376767998.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=how+to+make+a+supply+inventory+listPDF 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_off0000f13e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13E 17016 bytes
SHA-256: 182325801751457b70dc47384d3fa9d64db0c8a3f0d140dbe1db317ce91d67bc
font_01_sfnt_off00011dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000135df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135DF 10860 bytes
SHA-256: a75605311e162b3e5f20ee81c28cf7e0fb1f4ef51a1b40b8afaf15d8f51a1f1d

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