Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b5ea79b978a12ed…

MALICIOUS

PDF

103.8 KB Created: 2021-05-11 17:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: fa725a6211190d343e9d76eea0341e16 SHA-1: 28596a0bc8b9a466018c5703a9095a4638d66787 SHA-256: 1b5ea79b978a12ed3f273f726b4a07a40bf92ffee2aba69ff26d8efd76316b4e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file is detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to a "Dnd 5e homebrew class guide" and numerous embedded URLs, many pointing to disposable hosting. This suggests a phishing or scam attempt, likely using the lure of game content to drive users to malicious sites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://zajinet.ru/strik?utm_term=dnd+5e+homebrew+class+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4365591/normal_5fe5d1e3da784.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418383/normal_606001bee8f57.pdfIn PDF document text
    • http://lofomerevudawem.iblogger.org/whats_the_weather_like_outside_in_spanish.pdfIn PDF document text
    • http://7lessons.website/how_to_disable_alarm_on_onn_clock_radiol3og4.pdfIn PDF document text
    • http://netopodimamo.mywebcommunity.org/10146365052.pdfIn PDF document text
    • http://fetesitomer.mygamesonline.org/differential_pulse_code_modulation_theory.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462036/normal_5ffe1df444059.pdfIn PDF document text
    • http://tepoparupomo.medianewsonline.com/medical_abbreviations_quiz.pdfIn PDF document text
    • http://lishop.site/how_to_write_a_personal_narrative_grade_5qqcip.pdfIn PDF document text
    • http://bionatur.space/figufofumisiginll3b.pdfIn PDF document text
    • http://fegebekuxew.22web.org/39379153574.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/208a842a-7c57-4959-a32e-4b9581b9671e/jigosuzin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a24c4b10-f331-4e04-8e90-23e811666973/kedixuzowevimuzipano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbcd10ad-f9c7-49c0-a108-8a380f44970d/markus_rothkranz_the_prosperity_secret.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/bujusevoligamorekizesisux.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/killing_lincoln_movie_questions_and_answers.pdfIn PDF document text
    • http://kegeduwamid.epizy.com/project_almanac_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/area_of_parallelogram_worksheet_ks3.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/xefajamodi.pdfIn PDF document text
    • http://buvanudune.rf.gd/definition_of_appendicitis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caefbfcd-2d9d-4bed-bcef-67bab5dc8595/libros_de_fisica_cuantica_en.pdfIn PDF document text
    • http://manutilo.epizy.com/bewafa_song_pagalworld_imran_khan.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/first_alert_smoke_and_carbon_monoxide_alarm_manual_sc05.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_off00015943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15943 5708 bytes
SHA-256: 52922dd4e1600b9746b4019066d94eda12fe295346919fcab89db544947e6d8f
font_01_sfnt_off00016c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C98 10772 bytes
SHA-256: 235a2724482f4f42b9d0c00423b0e631b233ec6e457b0b43a8426998af2b2f4d

Open this report in the interactive analyzer, or submit your own file for analysis.