Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e179c861abd8eb…

MALICIOUS

PDF

69.8 KB Created: 2021-03-14 11:50:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 0399f7b154d1889e5e3a06cc22447c73 SHA-1: be96e3b15f8abca7d45c20f06745df01e1131ae8 SHA-256: e7e179c861abd8ebba3c3051953cbfc2cfd849bb8e0edc8b7a72826ace9dfab9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious phishing content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on disposable hosting, suggesting a phishing or malware distribution campaign. The presence of external URIs and the overall structure strongly suggest the document's purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://resalured.ru/123?utm_term=auralic+aries+femto+manual PDF link annotation
    • https://cdn.sqhk.co/berazanoga/itBhihd/chennai_super_kings_team_2019_players_photos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390638/normal_5feb1a4d27f59.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/how_to_convert_kindle_kfx_to_epub_pdf_mobi_with_calibre.pdfIn PDF document text
    • https://cdn.sqhk.co/tijinujul/gIuBgi1/wegux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492918/normal_5fd734c9a1a8f.pdfIn PDF document text
    • http://vosalax.22web.org/vanadiginebonofatuxen.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/jiihgje/guess_the_word_picture_words_games_puzzles.pdfIn PDF document text
    • https://cdn.sqhk.co/sidamebo/Vjegiif/tutorial_html_css_js.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447101/normal_6044c9ba95dc8.pdfIn PDF document text
    • http://winoxolupuvil.getenjoyment.net/how_to_program_a_universal_remote_without_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/zijikunu/cjjhcge/world_warships_combat_hack.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://63c5840e-267c-49ed-94d3-fc9f9d8b9c0b.filesusr.com/ugd/8c5bc8_d5cc810a7ea34711bb0161025edfe564.pdf?index=trueIn PDF document text
    • http://kepofif.onlinewebshop.net/xukunajula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4761559f-35c1-4c7e-ac2d-298d81fdb697/ill_be_gone_in_the_dark_hbo.pdfIn PDF document text
    • http://lenixad.epizy.com/android_web_browser_video.pdfIn PDF document text
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_e2c0dc08db19425d919c18479fe93b4e.pdf?index=trueIn PDF document text
    • http://lumosaneja.onlinewebshop.net/anticonvulsivantes_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e67e4c7a-1c8a-4135-a3be-330dee3994f4/quran_online_reading_with_urdu_translation.pdfIn PDF document text
    • https://667abc8f-92ca-45d9-bc9d-789c80a68858.filesusr.com/ugd/dcd78f_43c91b49ee5a4d6c95cf6b20f3105c22.pdf?index=trueIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_e22ee9af7138466fbbf5cb6d9cda78c2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/da980f03-39a0-4510-b6aa-2875a9ac7edf/brain_activation_techniques.pdfIn PDF document text
    • https://77bac38d-831a-46d6-8f22-d7743fcadc58.filesusr.com/ugd/5b9a87_a21e2be3b0a54d27b186787ecf0dc0f8.pdf?index=trueIn PDF document text
    • http://nekanonesogur.rf.gd/definition_of_bilateral_investment_treaty.pdfIn PDF document text
    • http://vibulowivez.epizy.com/senepofitaxuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaa74dd9-ce7a-4fc7-910d-fd043961e579/breakfast_at_tiffanys_quotes_film.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_off0000d397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD397 5016 bytes
SHA-256: c9b705e38360b4e96a5f9831a852b8f75fc1f63290454f08148946a9805fd5c5
font_01_sfnt_off0000e48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48E 11020 bytes
SHA-256: eea749e004bae09e3948ddc805f650d43b62f76cc906ee750ce7d5fae30f9d5b