Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf0e188756b5ee3d…

MALICIOUS

PDF

69.0 KB Created: 2021-03-05 07:26:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 852b20b3ddf434deeca8e6e055ca56f3 SHA-1: 9e888b12e7b198c2b5bf908fb276f5262dbbef06 SHA-256: bf0e188756b5ee3d011eecff64c691ccb0ac0f6e313b5b7901cd9ef214c85524
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/123?utm_term=saeco+magic+deluxe+manual+romana PDF link annotation
    • http://xoxunanodu.22web.org/does_elgato_work_with_ps4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480753/normal_5feaf301633c2.pdfIn PDF document text
    • http://rabiwitijif.medianewsonline.com/xojoz.pdfIn PDF document text
    • http://xedeporib.medianewsonline.com/what_is_chemistry_like_in_high_school.pdfIn PDF document text
    • https://lexawuvake.weebly.com/uploads/1/3/4/6/134610488/pozugadakasez.pdfIn PDF document text
    • http://vulifux.66ghz.com/yamla_pagla_deewana_2018.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381978/normal_5ffbbacb53c76.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/light_novel_no_game_no_life_lanjutan_anime.pdfIn PDF document text
    • https://raxorevowipafe.weebly.com/uploads/1/3/4/7/134765671/bb42163fd45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473616/normal_6026a2684f364.pdfIn PDF document text
    • http://nomokesus.sportsontheweb.net/char_broil_analog_electric_smoker_instructions.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/55778316292.pdfIn PDF document text
    • https://rutuwupu.weebly.com/uploads/1/3/1/3/131378820/gafipazapukowu_jakaxisum_rurevolarom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4cd5a77a-be8d-44ba-8952-4177873115c4.filesusr.com/ugd/930050_9899cba1f531483f8396c05801a3699d.pdf?index=trueIn PDF document text
    • http://pixagikaw.epizy.com/jinam.pdfIn PDF document text
    • https://c1bbde11-5cda-4f7c-8b74-b2fe90b484f5.filesusr.com/ugd/1c8c6c_dd367eac9bc54add8d18fbc6d3ac3476.pdf?index=trueIn PDF document text
    • https://5ac9d038-517d-4536-97f6-676423289421.filesusr.com/ugd/b444d4_9995ea0be5bc48c3bab8c40440fd3d99.pdf?index=trueIn PDF document text
    • http://xekazaz.myartsonline.com/planting_and_growing_green_onions.pdfIn PDF document text
    • http://naxesabefadufu.atwebpages.com/nekuvojonaju.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_off0000d06d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD06D 5252 bytes
SHA-256: 30a1a34a5b0ac1422d9589114c011506146da7a161953600ba96a5971e2fb88a
font_01_sfnt_off0000e235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE235 10728 bytes
SHA-256: 5006373c699d6fe173dd5cb54a670f5827246c4af44c23a4609e2d1d73d34b5b

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