Malicious PDF — malware analysis report

Static analysis result for SHA-256 b703bc26c6a11202…

MALICIOUS

PDF

76.0 KB Created: 2021-03-30 00:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: aabfaf45168481a66138d8644a8fb203 SHA-1: 7301a4864e32541ced1cde99f4d60225c25c0b2a SHA-256: b703bc26c6a11202185892492e074299dccb1af2ad925446dde725bb70b45cee
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 0.9996

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://midufefew.ru/strik?utm_term=why+is+my+controller+flashing+red PDF link annotation
    • http://merogerofame.66ghz.com/fuel_consumption_calculator_excel_template.pdfIn PDF document text
    • http://juvizex.sportsontheweb.net/punujijowatezadel.pdfIn PDF document text
    • https://cdn.sqhk.co/sepovili/jyriavO/57302102638.pdfIn PDF document text
    • http://nawavidosuk.medianewsonline.com/appareil_gnital_de_l_homme.pdfIn PDF document text
    • http://callup.today/holden_barina_2010_workshop_manual2osi0.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/bshat13/ark_survival_evolved_cheats_xbox_one_list.pdfIn PDF document text
    • http://lovelid.xyz/nijunekavigavusixubojont0grj.pdfIn PDF document text
    • http://ziwewixowele.sportsontheweb.net/folafov.pdfIn PDF document text
    • https://cdn.sqhk.co/vusutazomaga/niaOicW/mujarugekax.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374371/normal_5ff3b9640f4eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386591/normal_5fe3842d29472.pdfIn PDF document text
    • http://pifedalune.medianewsonline.com/whirlpool_dishwasher_model_wdf520padm7_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/7Qfgcia/zosog.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/JCjhhjd/nevupebakivawikadagu.pdfIn PDF document text
    • http://senatuxudo.iblogger.org/b._ed_books.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wasaxotudulolo.epizy.com/how_to_fix_a_dehumidifier.pdfIn PDF document text
    • http://xatabebufu.epizy.com/59003083248.pdfIn PDF document text
    • http://movalezipukud.epizy.com/remington_chainsaw_replacement_chain_16.pdfIn PDF document text
    • http://xafapitadejafi.epizy.com/cuneiform_cartilage_horse.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/how_to_reset_spandana_password.pdfIn PDF document text
    • http://bekegud.epizy.com/city_tv_news_reporters_toronto.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_off0000e934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE934 5548 bytes
SHA-256: 1eaad0f27f32ba17763248ae7a436a86b8809efea8266300affe42f9d3e9930e
font_01_sfnt_off0000fbfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFC 11288 bytes
SHA-256: 34f8efb8b22842a8b8143b3e695dbdd56bec656dae9aae69533505420f030456

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