Malicious PDF — malware analysis report

Static analysis result for SHA-256 8234a454cee35f51…

MALICIOUS

PDF

91.1 KB Created: 2021-04-30 23:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d82e344df7f7554e37122fee7ced29e9 SHA-1: 2193bb5465e47003c34bfc92788af2394c6605b4 SHA-256: 8234a454cee35f51fae919918e8350c7c6116f76521cf122b3e692b486d6ffa7
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary suspicious URL pointing to 'soxebez.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a second-stage payload via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 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://soxebez.ru/strik?utm_term=zoom+g1xon+price+in+pakistan PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376359/normal_604a87a28bf03.pdfIn PDF document text
    • http://reduslimitalia-ufficiale.site/gesumimexemakogiwavosuguad1jd.pdfIn PDF document text
    • http://pemufosapakem.mypressonline.com/bee_production.pdfIn PDF document text
    • http://superheatbelt.xyz/88571546299m4rg5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420245/normal_602af8fbead28.pdfIn PDF document text
    • http://saxosoxajivovud.medianewsonline.com/engineering_drawing_handbook.pdfIn PDF document text
    • http://bas-vorota.ru/laporan_praktikum_medan_magnetqoh51.pdfIn PDF document text
    • http://tulumiv.medianewsonline.com/xemadadutigar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366036/normal_5fc731c13a924.pdfIn PDF document text
    • http://rewita.fun/when_is_league_of_legends_patch37a0s.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://cg-designer.xyz/9307754808wbvp9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384470/normal_6025fa55b5de1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409239/normal_6050bc09649f6.pdfIn PDF document text
    • http://dragonflysagewellness.com/746328094437im6a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_274ab766539b49c89e776d86e16292cc.pdf?index=trueIn PDF document text
    • http://pokitudid.epizy.com/mosam_ki_barish_dj_song.pdfIn PDF document text
    • http://zimemotom.rf.gd/62489870349.pdfIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_691dba47fac546519bbf746c8d0244cc.pdf?index=trueIn PDF document text
    • http://tamikukezinubi.rf.gd/bissell_powerforce_vacuum_cleaner_belt.pdfIn PDF document text
    • http://wodedane.rf.gd/67558797550.pdfIn PDF document text
    • https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_e5f94593afd54d69a59f328810565183.pdf?index=trueIn PDF document text
    • http://jeborawaleko.atwebpages.com/read_in_the_afterlight_online_free.pdfIn PDF document text
    • https://000bb656-a8cb-4e8b-9327-0b0ec99f56fe.filesusr.com/ugd/3f812e_cee3b0486b1647f6a7b2c3b4d9faee06.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA46 5152 bytes
SHA-256: 804290541d6b176b3366a1afcafa7a5c0430e6d294c0106145c97aa2fe436d2b
font_01_sfnt_off00010bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBB 18216 bytes
SHA-256: 736ee7bf3a429c3c0355e1c2cd65077a73b4c77c350a24ccdc6bd7e137612d2f
font_02_sfnt_off00013b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B30 16164 bytes
SHA-256: ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1
font_03_sfnt_off00015048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15048 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3