Malicious PDF — malware analysis report

Static analysis result for SHA-256 a087593c6fe16152…

MALICIOUS

PDF

77.7 KB Created: 2021-04-01 00:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: c57836fd2b9d9fd649d838c91353b498 SHA-1: df1ff384d447f7638a0c6c0c32f379d5a0877a59 SHA-256: a087593c6fe16152dbec54b76c727b616c12288f26fce1712626eb4766147368
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, with one prominent link disguised as a guide for resetting Sony TV settings. This link, 'https://dugedepap.ru/strik?utm_term=how+to+reset+a+sony+tv+to+factory+settings', is likely intended to redirect users to a phishing or malware distribution site. The presence of a PDF link farm and ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://dugedepap.ru/strik?utm_term=how+to+reset+a+sony+tv+to+factory+settings PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369179/normal_6001fc5b976cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386848/normal_5fcd10a256465.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vebenok/b._ed_full_form_2018.pdfIn PDF document text
    • https://53f03ce6-db0b-4f41-9bfc-6956ba41e1f4.filesusr.com/ugd/727e0f_e0df2261b40a4b5e833637eb0311684e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b91e7a4-a7e7-4520-9b19-4fd463a5d7e3/jewap.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/zatikafijodovurugiziwe.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/rational_fasting.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/92683192538.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/97634878365.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/17209690432.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/universidad_del_tolima_sede_bogota_tunal_telefono.pdfIn PDF document text
    • https://f621ecf8-e26c-4db3-9bdf-176eeceb312d.filesusr.com/ugd/b3755e_0cebd122c6a548b490268414a964d3fc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/pexalopupekajuma.pdfIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_1e396221efe040c9afabaaa558071bd7.pdf?index=trueIn PDF document text
    • https://4590046d-f0a9-4171-b8a0-56ff8c1fe63c.filesusr.com/ugd/0bfb20_1470ef2d69744319bee9e0f8341ff2dc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zijivevip/volar_sobre_el_pantano_capitulo_1.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/brushwood_school_of_dance_performance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27949100-2e1f-404a-b6b4-7a7689b855d9/how_do_i_connect_my_canon_mg6320_printer_to_wifi.pdfIn PDF document text
    • https://11484d69-1612-41b9-9199-165df1f08223.filesusr.com/ugd/e2f197_6e00aa47c6f24a30bbe09086719a5f01.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/alitalia_404_final_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/19654848028.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45e279ad-9713-4d27-b2db-b9757a39adcd/lozejikerevobavenokid.pdfIn 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_off0000f12c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12C 5232 bytes
SHA-256: 70fc9922cae7a92eae11bf00ce8df7ca3d98b378ff1e2d40b5fc72409a53d285
font_01_sfnt_off0001032a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032A 11124 bytes
SHA-256: 745f66e82932992a32354c91403f536506adba91d7701f3cfeb396fc9b302b54

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