Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45894a4080e9361…

MALICIOUS

PDF

81.7 KB Created: 2021-02-13 00:21:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 75147a3a019e90be8ddb46c24dbd98a5 SHA-1: adb9ce34cc9eac563167e22969bf310a51a68a0a SHA-256: e45894a4080e936165bdb3d6fcfe8f8725ca16298dd4d5ea652dbd5f031f67df
186 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 0.9997

Heuristics 6

  • 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.
  • 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://jottigo.ru/wix?keyword=brilliant+blue+fcf+side+effects PDF link annotation
    • https://cdn.sqhk.co/javomekoru/eDhi9j5/stunt_car_derby.pdfIn PDF document text
    • https://cdn.sqhk.co/maxegugej/Hgjggxp/12_string_electric_guitar_for_sale_cheap.pdfIn PDF document text
    • https://cdn.sqhk.co/veleviziwew/DjjcboF/wivifutixiguvoxuwapixava.pdfIn PDF document text
    • https://cdn.sqhk.co/rivotoxupow/ePOzCmR/samsung_notes_backup.pdfIn PDF document text
    • http://xipuloval.iblogger.org/93568129260.pdfIn PDF document text
    • https://cdn.sqhk.co/sarunasol/6Qjahcu/best_minecraft_houses_to_build.pdfIn PDF document text
    • https://cdn.sqhk.co/xubodijixali/hjjhdhj/juwunip.pdfIn PDF document text
    • https://cdn.sqhk.co/japexexuko/ia566ij/4578302045.pdfIn PDF document text
    • https://cdn.sqhk.co/fivodewile/jajchgF/wajojomoxesudosesem.pdfIn PDF document text
    • https://jeludumekidi.weebly.com/uploads/1/3/2/7/132740852/nigaw.pdfIn PDF document text
    • https://cdn.sqhk.co/giboxikewev/hc4hcgf/hello_neighbor_act_2_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/manuguwe/hh9uihc/spinach_curry_recipes_for_dinner.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/Tiir3ie/zofijiziz.pdfIn PDF document text
    • https://cdn.sqhk.co/jipogidara/ieggjiQ/tumblebooks_username_and_password_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bixejefasi.epizy.com/eisenhower_matrix_google_sheets.pdfIn PDF document text
    • http://ponuruv.rf.gd/tercero_interesado_amparo_indirecto_formato.pdfIn PDF document text
    • http://riberudedanute.epizy.com/the_long_journey_adventure_game_mod_apk.pdfIn PDF document text
    • http://xagivetiji.epizy.com/lagu_film_masih_bukan_cinta_biasa.pdfIn PDF document text
    • http://dikawixum.epizy.com/industrialization_video_worksheet.pdfIn PDF document text
    • http://kexofiz.epizy.com/wekaxazafodozeloxixi.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_off0000ff6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6B 5204 bytes
SHA-256: 33e0985c8961e59489ee12665e43e45549bb085d0f94f8c1a0af2f6e542fb955
font_01_sfnt_off00011127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11127 12244 bytes
SHA-256: 756e271a7f8e415fa69b214182ccde721c38d2ceca7c1eb27fa2b61db9ee4173

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