Malicious PDF — malware analysis report

Static analysis result for SHA-256 18a3bbe42a5c3cfa…

MALICIOUS

PDF

80.4 KB Created: 2021-03-20 21:30:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: cf03b78ca1be827886394307f051db3c SHA-1: d75cc331560f08351d35fb1bb64e6fc306867820 SHA-256: 18a3bbe42a5c3cfa03ec0f6df4a64af08f6423ca4d6f4982e8aaf25d8d7a539c
174 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'SE_ENCRYPTED_DOC_LURE' suggests the document is designed to deceive users with fake content and direct them to malicious URLs. The embedded URLs, such as 'https://jacksth.ru/wix?keyword=short+rental+agreement+template+south+africa' and a link to a Weebly-hosted PDF, are likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake encrypted/secure-document view lure high SE_ENCRYPTED_DOC_LURE
    Document claims to be an encrypted or protected file that must be opened through a 'secure view' link, and the action link uses deceptive infrastructure. This is the secure-document credential-phishing carrier: the page imitates a secure-mail / document-cloud gate while the link leads to a harvesting site. action link to abused redirector.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/wix?keyword=short+rental+agreement+template+south+africa PDF link annotation
    • http://cocobeautybar.ca/baldurs_gate_2_release_date_ps4fn5da.pdfIn PDF document text
    • http://sogejovep.mypressonline.com/petsafe_drinkwell_platinum_pet_fountain_reviews.pdfIn PDF document text
    • http://forajadafogaxuv.medianewsonline.com/pusinax.pdfIn PDF document text
    • http://xuxijosut.sportsontheweb.net/5671129610.pdfIn PDF document text
    • http://sizuxofutitarax.mypressonline.com/como_se_llama_el_libro_del_principito_en_ingles.pdfIn PDF document text
    • http://mebovaduzi.mywebcommunity.org/how_to_use_sports_hd_dv_sq11_mini_dv_camera.pdfIn PDF document text
    • http://creditscoretracking.info/keith_hawton_cbt_free_download6siqc.pdfIn PDF document text
    • http://kawasus.scienceontheweb.net/bodas_de_sangre_resea.pdfIn PDF document text
    • http://fobativ.mywebcommunity.org/borderless_printing_mac.pdfIn PDF document text
    • https://tovuwofox.weebly.com/uploads/1/3/4/7/134731163/vezazegebenudob.pdfIn PDF document text
    • https://waxalema.weebly.com/uploads/1/3/4/3/134364729/9146161.pdfIn PDF document text
    • https://mamaganonofob.weebly.com/uploads/1/3/4/6/134602085/3693883.pdfIn PDF document text
    • http://tuimag.ru/wavijegununapirotstf7p.pdfIn PDF document text
    • http://evgeniy-semenenko.ru/invisible_man_film_2020_casty68aa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gixarewujedel.atwebpages.com/povukadaxalakinelewut.pdfIn PDF document text
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_e9cf480fe9ec4877aefd7795dbb2b6e2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nemafu/dometic_capacitive_touch_thermostat_user_s_guide.pdfIn PDF document text
    • http://desigaweru.myartsonline.com/dieta_cetogenica_alimentos_permitidos_y_prohibidos.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/anytone_at-5888uv_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/action_jackson_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/which_statement_describes_a_criticism_of_maslows_theory_of_motivation.pdfIn PDF document text
    • https://7f06b679-e14d-4525-8955-d56a7cf6f710.filesusr.com/ugd/79e5df_68580d7231a84880bd54fb25bd25e3b3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/chokra_jawaan_song_pagalworld.pdfIn PDF document text
    • http://sokekakeloji.onlinewebshop.net/tipos_de_centrales_termoelectricas.pdfIn PDF document text
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_bc2eb043734544339cfe8a08c0759fba.pdf?index=trueIn PDF document text
    • https://e21f0dd0-e693-4a2a-aa38-6cab66162128.filesusr.com/ugd/34eed6_46820d3a6224423db47474a2622c6a5f.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC16 5532 bytes
SHA-256: 4647a24ba7d43a6c2674c81356e4fe50055fe94c0d511037e3c41e026981236e
font_01_sfnt_off00010ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBF 10908 bytes
SHA-256: 936e072eb4e06a6a5e0ede05b81acdc812737f668274174fbde4fe8e8e85182f