Malicious PDF — malware analysis report

Static analysis result for SHA-256 8505268eb23eee2b…

MALICIOUS

PDF

77.3 KB Created: 2021-03-04 10:52:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 118a5c02661b6bf201e4c67d97dae6e2 SHA-1: e441a342f8cbd12a69f8c6ba89e308a2f4c6b3c0 SHA-256: 8505268eb23eee2b7c5d1a0deb461eda2407924b13c5740d5cd7f1330848eaf9
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting a link farm or redirection to malicious sites. While no scripts were explicitly extracted, the presence of embedded URLs and the PDF structure strongly suggest it's designed to redirect users to potentially harmful content, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/wix?keyword=shareit+apk+free+download+for+iphone PDF link annotation
    • http://dujalubudekir.22web.org/91782847423.pdfIn PDF document text
    • http://tebifujokejub.22web.org/what_kind_of_smoothie_can_i_make_with_spinach.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/what_items_are_gluten_free.pdfIn PDF document text
    • https://zafasasuk.weebly.com/uploads/1/3/4/7/134713251/pobusu-sosutevenabeki-xetivuze-josase.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pasemox.rf.gd/nifixezijux.pdfIn PDF document text
    • http://rixibedi.onlinewebshop.net/8480881406.pdfIn PDF document text
    • http://wazeniwemir.onlinewebshop.net/nintendo_wii_virtual_console_games_download.pdfIn PDF document text
    • http://fabedidatifi.onlinewebshop.net/electric_scooter_repair_san_diego.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/spider_man_2019_game_for_android.pdfIn PDF document text
    • http://zabusokaruzovi.rf.gd/73726851509.pdfIn PDF document text
    • https://s3.amazonaws.com/vajefam/wawejemuguxajasuf.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/xigiruvigiz.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/8467894831.pdfIn PDF document text
    • http://mubizutoperix.rf.gd/neverending_story_netflix_2020.pdfIn PDF document text
    • http://pixagikaw.epizy.com/countable_and_uncountable_nouns_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/fakajudiboramal.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/pdf_1100_words.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/rivavusetesosejet.pdfIn PDF document text
    • http://turufefi.rf.gd/toxivitevivikananelerosi.pdfIn PDF document text
    • http://lajirobodogew.epizy.com/chale_aana_pagalworld_320kbps.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/free_prezi_templates_for_students.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/bsf_recruitment_2019_application_form.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_off0000f141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF141 5208 bytes
SHA-256: 18cad3ed6495e636c315381620608f3e90465f2b7bc21e9c2d7c60acf845abaa
font_01_sfnt_off00010308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10308 10760 bytes
SHA-256: 0e43f4781e31fb536036dc76fd1d69b7557a32c8b7e57335d8b9b67defdc7d68

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