Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad59e283c40b833…

MALICIOUS

PDF

76.8 KB Created: 2021-04-09 01:49:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7240dc39613e9266fc59f2141c7ec359 SHA-1: 5a833e2db688d0cde6b7aa271a14a33c284df707 SHA-256: 5ad59e283c40b83363eb9aa6f73f9f2625228dedb3423bb6a367584266997d41
126 Risk Score

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 0.9995

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://dafemum.ru/strik?utm_term=andreas+moritz+books+amazon PDF link annotation
    • http://vatidenow.medianewsonline.com/bienaventuranzas_significado_de_cada_una.pdfIn PDF document text
    • http://nowukusox.mypressonline.com/basics_english_grammar.pdfIn PDF document text
    • http://vozajomaralamer.mygamesonline.org/24543563737.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzagile/ieLgfhb/6148527815.pdfIn PDF document text
    • http://bezinawevudo.22web.org/shadowrun_returns_install_mods.pdfIn PDF document text
    • http://trickyturkey.com/apple_books_app_for_androidflzm9.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://werikipirojenob.scienceontheweb.net/honda_shadow_sabre_1100_wiring_diagram.pdfIn PDF document text
    • https://cdn.sqhk.co/pugepavofu/6cXgiid/fejerofugalaxu.pdfIn PDF document text
    • https://cdn.sqhk.co/sexasegavon/haHi0gf/police_chase_thief_pursuit_apk_download.pdfIn PDF document text
    • http://vuroxinizona.scienceontheweb.net/arms_reach_cambria_co_sleeper_sheets.pdfIn PDF document text
    • http://giocodigital.website/how_to_use_tablet_as_writing_padfovs8.pdfIn PDF document text
    • http://copyright-central-media.com/wendys_dollar_menu_20216w3d1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://734e8db3-b9db-457c-abaa-08c06218e7ae.filesusr.com/ugd/f6bb82_a4663471beac4ba08b8e024f6d28da8b.pdf?index=trueIn PDF document text
    • http://mekebinaga.rf.gd/42736252859.pdfIn PDF document text
    • http://xixepobubin.epizy.com/high_school_math_probability.pdfIn PDF document text
    • http://ronageze.rf.gd/naming_acids_and_bases.pdfIn PDF document text
    • https://31e64076-56b3-4e53-9780-179364fbad2f.filesusr.com/ugd/d8d3cb_ce22683efa0842228a7ccdf1f511aec7.pdf?index=trueIn PDF document text
    • http://wudemexa.myartsonline.com/commercial_electric_multimeter_ms8301a_manual.pdfIn PDF document text
    • http://muduwabu.rf.gd/small_reader_software_for_pc.pdfIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_f0f64d137a6e4ce082ab94089c7ccc4b.pdf?index=trueIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_6d781276c7fb4208ae310ae7e964019c.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ece4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE4 5184 bytes
SHA-256: c33a9cfae9664b0be15254377e8b39af28ddbb4aebf6ac507445d8f9c9fabdec
font_01_sfnt_off0000fe72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE72 11752 bytes
SHA-256: eacc7b837e3ab0ddd3f9a17847a1c4cc8bc7762421ea9029fb02098dfe165763

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