Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa5fe1df1fba5e7f…

MALICIOUS

PDF

90.5 KB Created: 2021-04-11 08:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8c5a1b62ce50abb71acea2f7fc810a11 SHA-1: c43a7548953d93799e480899bd45cb4f5dcbfcc9 SHA-256: fa5fe1df1fba5e7f11f81d7bec4f92e1b29af182bf1be39bbc990b8e1e1774c2
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous embedded URLs, with several pointing to disposable hosting and link farm domains, indicating a likely attempt to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, suggesting the document's primary purpose is to host a large number of links for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://druttle.ru/strik?utm_term=center+point+scope PDF link annotation
    • http://sadogiropi.mypressonline.com/zifenidoxazelidotova.pdfIn PDF document text
    • https://fojakodi.weebly.com/uploads/1/3/1/3/131379163/dizaximogujazefak.pdfIn PDF document text
    • http://koparikamoze.scienceontheweb.net/15342409769.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457005/normal_5fdc16f442730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450260/normal_600b346c795c3.pdfIn PDF document text
    • http://notawax.iblogger.org/clostridium_difficile_adalah.pdfIn PDF document text
    • http://extrameets.fun/criminal_law_attorney_job_description0gg2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402289/normal_604e9ed558060.pdfIn PDF document text
    • http://carinsusa.com/3257429405bw9kb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412584/normal_5fd6745a5b0da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367937/normal_60058405ba08e.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/resirekizozimadetu.pdfIn PDF document text
    • https://ligapixoxos.weebly.com/uploads/1/3/4/3/134378271/dibuj.pdfIn PDF document text
    • http://eurofamily.pro/40565219024tz3vl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jalijoruki.atwebpages.com/application_of_computer_graphics_in_education_and_training.pdfIn PDF document text
    • http://fegozovot.rf.gd/airtel_4g_hotspot_manual.pdfIn PDF document text
    • http://xumutopefar.rf.gd/new_headway_beginner_teacher_s_book.pdfIn PDF document text
    • http://dimexibagumaza.epizy.com/sql_injection_cheat_sheet.pdfIn PDF document text
    • http://safodur.epizy.com/combining_like_terms_practice.pdfIn PDF document text
    • http://dowomux.rf.gd/15570910.pdfIn PDF document text
    • http://nowapuporab.epizy.com/android_10_para_samsung_note_8.pdfIn PDF document text
    • http://datonojafasaxup.rf.gd/saturation_of_current_transformer_definition.pdfIn PDF document text
    • http://nonomajemiw.rf.gd/12765807966.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE8 4588 bytes
SHA-256: 1567bf9d03b12bdc859ccdc30c22b21768c6ce0a01f39648e1a3a7e43bf64a2a
font_01_sfnt_off00011f94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F94 11804 bytes
SHA-256: f269e28bc494d6f3bd930591c25e69aed94ce3f6b8b29543481cb050831d2d07
font_02_sfnt_off00014861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14861 16064 bytes
SHA-256: 62057359ad22ed6c79ab6a94c34af50e7f9192dd49eed379a27769cab1f8071c

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