Malicious PDF — malware analysis report

Static analysis result for SHA-256 52e1e30eed412122…

MALICIOUS

PDF

75.1 KB Created: 2021-06-14 06:10:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ed365c60e5d064796a573ec525b32ad4 SHA-1: 3ba1aedebf04be396c02813c5683963f96c1e7eb SHA-256: 52e1e30eed4121224ad13ab0dbb2ec72999b9a282ae7c2d897122af9851f58d5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous links, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious phishing content. The primary URL, https://oniceh.ru/pbw?utm_term=download+snaptube+apk+latest+version+for+android, suggests a lure to download an Android application. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a phishing attempt designed to trick users into downloading potentially malicious software.

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 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://oniceh.ru/pbw?utm_term=download+snaptube+apk+latest+version+for+android PDF link annotation
    • https://pezobarifad.weebly.com/uploads/1/3/5/3/135394950/58337e1fedf00c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463794/normal_5fd8389e963d2.pdfIn PDF document text
    • https://duvefotod.weebly.com/uploads/1/3/1/3/131380754/kavopasimar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487423/normal_5febd1fa6cbb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412762/normal_60350ba368730.pdfIn PDF document text
    • https://wadotadu.weebly.com/uploads/1/3/4/6/134633645/79828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475730/normal_60b85f672a9ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kinuwibe.pbworks.com/w/file/fetch/145113615/ms_word_page_border_designs_free_download.pdfIn PDF document text
    • http://ragasegena.pbworks.com/f/positive_words_that_start_with_ex_to_describe_a_person.pdfIn PDF document text
    • http://rajejor.pbworks.com/w/file/fetch/145077309/social_liker_app_2020.pdfIn PDF document text
    • http://wudapokot.pbworks.com/f/psycho_pass_3_tsunemori.pdfIn PDF document text
    • http://veweran.pbworks.com/w/file/fetch/144462000/california_dmv_handbook_2020_audio.pdfIn PDF document text
    • http://namikikis.pbworks.com/f/muzurodoxoxovaxe.pdfIn PDF document text
    • http://molitutolu.pbworks.com/f/free_download_adobe_illustrator_cs5_full_version.pdfIn PDF document text
    • http://palejemevat.pbworks.com/f/15603667288.pdfIn PDF document text
    • http://labidan.pbworks.com/w/file/fetch/144468564/el_viaje_del_heroe_campbell.pdfIn PDF document text
    • http://wekanivu.pbworks.com/w/file/fetch/145195077/document_file_convert_into.pdfIn PDF document text
    • http://nilanom.pbworks.com/f/zisoxubujezi.pdfIn PDF document text
    • http://xojifot.pbworks.com/w/file/fetch/144426618/is_foggy_brain_a_symptom_of_covid_vaccine.pdfIn PDF document text
    • http://jawegele.pbworks.com/w/file/fetch/144671316/girl_x_battle_2_redeem_code_2019.pdfIn PDF document text
    • http://fenetikuro.pbworks.com/f/fifa_21_apk_android_download.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_off0000e762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE762 5388 bytes
SHA-256: 6ee6868b9c2f8895839e51f6fc2f58dadeea614c26e25e8b02b1fd0e12023b7c
font_01_sfnt_off0000f9dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DD 10724 bytes
SHA-256: c0535be9ada975806cfe6f963db05abf71ebf50d7ec0be4e29e48a97bec7e235

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