Malicious PDF — malware analysis report

Static analysis result for SHA-256 c11158e0e2eaa6d5…

MALICIOUS

PDF

92.3 KB Created: 2021-04-30 07:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 38f35934dcef9d8b34498269e3b7b48a SHA-1: 997fd6317e0217679169cb6daf8395887799d35c SHA-256: c11158e0e2eaa6d5afb545ce079d0e42febbb2e39442d9d336e2ddc20c5e7deb
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xajibur.ru/strik?utm_term=beginner+jazz+piano+sheet+music+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372982/normal_5fe54692728b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479902/normal_5fe9018524dc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480728/normal_60415f047add7.pdfIn PDF document text
    • http://kogutojoveso.mywebcommunity.org/las_persecuciones_contra_los_cristianos_en_el_imperio_romano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449406/normal_602a2331d437e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501794/normal_5ff86a257322e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370987/normal_5fd12efbe59f2.pdfIn PDF document text
    • http://gidilakapajuke.mywebcommunity.org/english_grammar_for_beginners_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472774/normal_604ae688ddc5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370996/normal_5ff554789d681.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425227/normal_5feb52e79941f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483346/normal_606e2235af30c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419412/normal_5fd9e438b130b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453103/normal_5fee336571a97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378857/normal_602a25589e643.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/boxujetanonikuv/chicco_keyfit_30_infant_car_seat_installation.pdfIn PDF document text
    • http://gafodix.myartsonline.com/balancing_chemical_equations_worksheet_110_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb823f2c-9f18-4991-b7c7-7887d27e6934/esv_literary_study_bible_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05fe5695-ca4e-4957-b3b0-39b01c102040/21188000596.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/free_label_printing_template_14_per_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95bac980-ee6f-4334-a8e6-d2fc89c2c31e/how_to_find_vif_in_sas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d9741a4-9c6a-4bbf-837d-d76eba715eff/asus_sabertooth_990fx_r2_0_audio_drivers_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72da148d-ac77-4084-a2f7-ffccc7dba102/agencia_de_marketing_digital_como_funciona.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11270 5712 bytes
SHA-256: d6f230ce09ba7ae7cba25ac1a969df51a3168c36b1d74ab60ff4f7d6a4ae6dca
font_01_sfnt_off000125c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C8 11836 bytes
SHA-256: aa6305c50c4ad9353a4f8083d2510131d3125b9710eb7b3310d58784d508a930
font_02_sfnt_off00014ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DDF 16100 bytes
SHA-256: b330339415d7fa9c1b652c1fb2a052ec06569061b7b71506ab53161dc9b94742

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