Malicious PDF — malware analysis report

Static analysis result for SHA-256 bef02b5161896320…

MALICIOUS

PDF

70.9 KB Created: 2021-04-28 03:23:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 729306ec83b77e07d7fcf0af51b71d70 SHA-1: 26dd68a13d0d37d48c64b0330a4e664b11f71014 SHA-256: bef02b516189632024264f3b4014ea4d88e261bfada32bce2c42f9680ba12d22
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting services, and is structured as a link farm. The presence of external URIs and the overall heuristic profile suggest it is designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=camera+lucida+book+pdf PDF link annotation
    • https://memibiwogiluged.weebly.com/uploads/1/3/4/1/134131866/jetegemetenif.pdfIn PDF document text
    • http://tezuveripoxub.mypressonline.com/mechanical_engineering_jobs_for_freshers_in_bangalore.pdfIn PDF document text
    • https://fewojejano.weebly.com/uploads/1/3/4/3/134348079/jupul_kaguroxafaked.pdfIn PDF document text
    • https://tiwabegi.weebly.com/uploads/1/3/0/8/130874513/tanoloxejase_pezidatad_xeruzuf_zotejiraz.pdfIn PDF document text
    • https://nizevamil.weebly.com/uploads/1/3/2/8/132814567/dumodipisawiramusa.pdfIn PDF document text
    • https://bumogekatagod.weebly.com/uploads/1/3/0/7/130776321/rirumobuliwokepa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463298/normal_60219513ac0c2.pdfIn PDF document text
    • https://komamopiragi.weebly.com/uploads/1/3/4/4/134444029/a54f6e836d9.pdfIn PDF document text
    • https://gevupowola.weebly.com/uploads/1/3/1/4/131483584/8907497.pdfIn PDF document text
    • https://xumusozopojuvuj.weebly.com/uploads/1/3/1/3/131398507/lemuzorem_pagabat_zujuwili.pdfIn PDF document text
    • http://kasaxeko.mypressonline.com/ribomafat.pdfIn PDF document text
    • https://fonekukiko.weebly.com/uploads/1/3/5/3/135393218/kibasenired.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481280/normal_5fe01a7b800ce.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lifobem.myartsonline.com/36742126518.pdfIn PDF document text
    • http://nabeluropezoli.rf.gd/ielts_writing_test_paper.pdfIn PDF document text
    • http://nopugorib.onlinewebshop.net/ayurvedic_gujarati_book.pdfIn PDF document text
    • http://doritiwenoxa.onlinewebshop.net/minigojunivogipedoser.pdfIn PDF document text
    • http://nunakonagavigik.epizy.com/alabama_a_m_university_application.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_off0000d7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F8 5232 bytes
SHA-256: cefb9f139bc4055cf4b833183fcfb2f7af2cb18806070e8a68c346d4d00d9c53
font_01_sfnt_off0000e9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A9 10832 bytes
SHA-256: 33912d83459c4e421d3d15d2dbc49d9a6b3bf2e00f67147270f18c3b4fd43581

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