Malicious PDF — malware analysis report

Static analysis result for SHA-256 02418edc3166769e…

MALICIOUS

PDF

80.3 KB Created: 2021-03-26 07:22:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9d86aac31bc9577ef23dcd540193b478 SHA-1: 95bc552f524a9c4f46188adb96195430d6ab5912 SHA-256: 02418edc3166769ebfcae2eec33ecd7f9b854ab2815fe95a5e11e9a4f32bf8d8
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/strik?utm_term=attack+on+titan+season+4+episode+2+release+date+crunchyroll PDF link annotation
    • https://cdn.sqhk.co/molodomo/kYgcibS/netflix_party_alternative_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/rgfjjid/hmrc_self_employed_grant_claim_form.pdfIn PDF document text
    • https://dotuxebi.weebly.com/uploads/1/3/1/4/131454754/5745956.pdfIn PDF document text
    • https://cdn.sqhk.co/mutexeze/ahdgeXj/inside_out_and_back_again_chapters.pdfIn PDF document text
    • https://cdn.sqhk.co/wewesodabutu/gcfihgf/bullitt_1968_dublado.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosewude/2jjY9xs/rozeforalijinamepezo.pdfIn PDF document text
    • https://sanokigoj.weebly.com/uploads/1/3/4/8/134863934/8220543.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/kawotexulozax/possessive_form_of_chris.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/symantec_endpoint_detection_and_response_administration_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/zatudugokodirofaj.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/task_synchronizing_subscribed_folders_reported_error_0x800ccc0e.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/adobe_reader_8_offline_installer_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/wotuxesaz.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/41868912058.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/bases_de_datos_en_excel_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/avast_free_offline_installer_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/goxonujimaguxerivafujeto.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/what_year_does_storm_kings_thunder_take_place.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_off0000f899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF899 5536 bytes
SHA-256: ecf650388ac3b4e2733ac685925b357b517ee05ea964c7b87ab64a79f137dcd1
font_01_sfnt_off00010b7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B7B 11176 bytes
SHA-256: db85fda1b71a5a464f0ff964c8f7eaeab8438e9c97db0f217949e4fc87db250f

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