Malicious PDF — malware analysis report

Static analysis result for SHA-256 92e6fb11b9288efe…

MALICIOUS

PDF

81.1 KB Created: 2021-03-31 00:56:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: abbd5679d88fb778156f6bfd9a035da9 SHA-1: 903f5ff595000a077228448c46531cde06deac2c SHA-256: 92e6fb11b9288efea1d516021bd618ea2171358baa5223cff3a47831f2638490
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with several pointing to disposable hosting or unknown reputation sites, suggesting a link farm or redirection scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links on potentially untrustworthy domains, reinforcing the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/award?keyword=destination+delf+b1+pdf+vk PDF link annotation
    • http://bred-enligne.com/cartoon_comedy_tinyjuke4neyg.pdfIn PDF document text
    • http://it50disconto.info/how_to_describe_authors_writing_stylelqohi.pdfIn PDF document text
    • http://masozoza.iblogger.org/vijixujademadozav.pdfIn PDF document text
    • http://gitikirazidapi.medianewsonline.com/badger_5_insinkerator_manual.pdfIn PDF document text
    • http://mipuruf.22web.org/tezexasogige.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/ejercicios_de_limites_por_racionalizacion_resueltos.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/boranugusepilarezebaj.pdfIn PDF document text
    • http://lowixop.22web.org/ascendant_divergent.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://uploads.strikinglycdn.com/files/a798525f-78ac-44f7-acf0-0ead0eb10930/40227860304.pdfIn PDF document text
    • http://wovodijulenape.onlinewebshop.net/biological_computers.pdfIn PDF document text
    • http://sasukagisodubex.onlinewebshop.net/kukona.pdfIn PDF document text
    • http://gevapugono.atwebpages.com/telemecanique_altistart_48_user_manual.pdfIn PDF document text
    • http://sujawokasafu.onlinewebshop.net/65039260134.pdfIn PDF document text
    • http://bividit.rf.gd/64127746598.pdfIn PDF document text
    • http://sulijugofogim.onlinewebshop.net/how_to_breed_perfect_iv_pokemon_ultra_moon.pdfIn PDF document text
    • http://jazopizebe.atwebpages.com/pdf_pathophysiology_of_pneumonia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c2398a0-b57b-413a-91ca-c0a2417b2cfc/merupu.pdfIn PDF document text
    • http://pexuxiwug.rf.gd/zukizezolopawi.pdfIn PDF document text
    • http://rexivire.epizy.com/1660155450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3c02306-e9bc-4bca-8bdd-d3f88d3c5801/journey_to_the_center_of_the_earth_novel_synopsis.pdfIn PDF document text
    • http://jutefuzu.rf.gd/betway_app_link.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE678 2952 bytes
SHA-256: e211f2d6e0d1bf1fd17bd5150bc2724fb7c0f1d37b1c69b855d9dcad8de34ab0
font_01_sfnt_off0000f106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF106 5044 bytes
SHA-256: d9980f9d7396c036d55dafa0f49f7ae9563edd11ec910fc0bef71b19f29b3c4f
font_02_sfnt_off00010249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10249 11500 bytes
SHA-256: c3faad6e9a641b6c638b1ee1c95e7e94608ab168367a9e3640fcd0d4ecf42bc4
font_03_sfnt_off00012883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12883 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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