Malicious PDF — malware analysis report

Static analysis result for SHA-256 4130535e3883c3de…

MALICIOUS

PDF

78.4 KB Created: 2021-05-01 13:34:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a5238925a8bc235ddbf53557c37c985a SHA-1: 1add8f0818c3cd6e8fb1d9d7f6e7619f43274c11 SHA-256: 4130535e3883c3de385f4999ac8f8ee92391f670ede5c69eae35abf83ecbb4dc
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded external links, identified as a link farm. The primary URL, 'https://bologen.ru/strik?utm_term=does+frank+die+in+the+trials+of+apollo', suggests a potential phishing or SEO manipulation tactic. ML classifiers and ClamAV also flagged this file as malicious, indicating a high likelihood of malicious intent. No scripts were extracted, but the structure and embedded links point towards a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/strik?utm_term=does+frank+die+in+the+trials+of+apollo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383300/normal_5fd64e7074f86.pdfIn PDF document text
    • https://puduwuxibipufu.weebly.com/uploads/1/3/5/9/135966859/164f4cf5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448740/normal_6047b6948954d.pdfIn PDF document text
    • https://wefomupexe.weebly.com/uploads/1/3/4/4/134491092/14dcefd29.pdfIn PDF document text
    • http://pajuwepubawip.sportsontheweb.net/73348722000.pdfIn PDF document text
    • http://kosamaritaj.getenjoyment.net/68933897911.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_604cf229502bc.pdfIn PDF document text
    • https://jipuzalo.weebly.com/uploads/1/3/4/6/134693454/penumibidusefos.pdfIn PDF document text
    • http://luxuwum.mypressonline.com/difuxikuwatowat.pdfIn PDF document text
    • https://pibefugaradaxo.weebly.com/uploads/1/3/1/3/131398186/5414935.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nuwadolonopip.onlinewebshop.net/wiroxef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/391f0f31-22c3-40f3-85d5-49636aee16e0/the_vegetarian_part_2_summary.pdfIn PDF document text
    • https://661c91a2-68a2-4ae3-aaac-ef96b6cc7894.filesusr.com/ugd/b926a8_31f4afbd6b1f4b8cac10fdc82fc9286d.pdf?index=trueIn PDF document text
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_a97b6de217e04a349cd2f9b7bd1d6370.pdf?index=trueIn PDF document text
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_3471682c2ac44b1d914c27911e2ab4b9.pdf?index=trueIn PDF document text
    • http://wazipegemezen.atwebpages.com/cancionero_chileno_para_guitarra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8ef288f-f0e2-4588-977b-5fdd5c77f11b/summer_waves_pool_18_x_52_pumpe.pdfIn PDF document text
    • https://73f4d879-981c-49fe-abc7-520f36a14a84.filesusr.com/ugd/b77b08_94b5a593ccdc4dc89090c2e0794e8a73.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffe7a3d2-5e20-4d68-872c-7fb7115a6094/language_teaching_methods_and_approaches.pdfIn PDF document text
    • https://835a0401-7144-467e-aacc-710587930ffc.filesusr.com/ugd/432cba_8458bf20687f4fdbaa459a246c5606f9.pdf?index=trueIn PDF document text
    • https://72b50e20-f79f-40ca-96b4-24bef83e308f.filesusr.com/ugd/1a1092_09af311ad6bf4d48a7df5d5e9dd17814.pdf?index=trueIn PDF document text
    • https://6d0c6d30-55b9-4b7f-8145-34d11b484ddf.filesusr.com/ugd/8db56d_0f196e9c2eeb44daae74f4c08997e8ec.pdf?index=trueIn PDF document text
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_6ca496890703422e992be260e409b888.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AA 5192 bytes
SHA-256: 274d9cff6951d44e3d1da0ea5ef1a924f8a544c70e583bb3685a55c8fd7dac51
font_01_sfnt_off00010752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10752 10828 bytes
SHA-256: d75c8f5fc5a973320f787974951a2de95fdb4577dbf027f4451046247f57dee5

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